When comparing Logitech G502 Proteus Spectrum vs Logitech G900 Chaos Spectrum, the Slant community recommends Logitech G502 Proteus Spectrum for most people. In the question“What is the best gaming mouse?” Logitech G502 Proteus Spectrum is ranked 1st while Logitech G900 Chaos Spectrum is ranked 7th. The most important reason people chose Logitech G502 Proteus Spectrum is:
The G502 gaming mouse has 11 programmable buttons, support for macros and profiles, adjustable weight and center of balance, two scroll wheel modes, and a plethora of settings to customize. In addition to the standard left, right, and scroll wheel buttons, there's a button below the scroll wheel, three thumb buttons, two buttons to the left of the left mouse button and you can tilt the mouse wheel left and right for extra functionality as well. All of these buttons can be programmed to do pretty much whatever you want. The scroll wheel can act as a smooth unhindered scroll or a notched scroll depending on how you want to use it. It has an on-the-fly CPI switch with 5 states and the mouse can store three different macro profiles and can switch between them with a button press. You can also customize the weight of the gaming mouse between 121-139 grams and its center of balance with up to five 3.6 gram weights to adjust how it feels as it moves across your mousepad.
Specs
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Pros
Pro Highly customizable
The G502 gaming mouse has 11 programmable buttons, support for macros and profiles, adjustable weight and center of balance, two scroll wheel modes, and a plethora of settings to customize.
In addition to the standard left, right, and scroll wheel buttons, there's a button below the scroll wheel, three thumb buttons, two buttons to the left of the left mouse button and you can tilt the mouse wheel left and right for extra functionality as well. All of these buttons can be programmed to do pretty much whatever you want.
The scroll wheel can act as a smooth unhindered scroll or a notched scroll depending on how you want to use it.
It has an on-the-fly CPI switch with 5 states and the mouse can store three different macro profiles and can switch between them with a button press.
You can also customize the weight of the gaming mouse between 121-139 grams and its center of balance with up to five 3.6 gram weights to adjust how it feels as it moves across your mousepad.
Pro Allows you to switch between notched and smooth scroll wheel modes
The scroll wheel can act as a smooth unhindered scroll or a notched scroll depending on how the user wants to use it.
Pro Scroll wheel has useful horizontal clicks
The scroll wheel can be pressed form side to side to enact two different programmable button presses.
Pro Easily accessible 5 buttons on the side of the mouse
Unlike most mice with two side buttons accessible with your thumb the G502 has five. Three are very easily accessible with hardly moving your thumb and two require some movement yet are still pretty easy to get to. asdfasd
Pro Amazing 12000 CPI optical sensor
The Logitech G502 Proteus Core gaming mouse has an impressively accurate 12000 CPI optical sensor that's capable of tracking speeds up to 7.5 m/s. There is no acceleration, angle snapping, prediction or jitter even at max CPI.
Pro Great for palm and claw grips
Palm and claw grip both work pretty well on this device.
Pro Thumb-rest and textured side grips provide good grip
The thumb rest and texture side grips helps the user grip the device better.
Pro Control the weight
You can use the magnet to adjust the weight.
Pro Cable braiding protects it from accidental damage
The DeathAdder Elite gaming mouse has a 2.13m braided cable, that helps prevent kinking, curling and protects the cable prolonging life of mouse.
Pro Good, long-lasting build quality
This mouse is built to last with its mechanical button switches, smooth teflon feet, and lengthy braided cable. The built in rubber thumb rest and rubber side panel makes the mouse ergonomic as well as reducing wear-and-tear. These features combined make for a device that will last for a good while.
Pro Accurate Sensor
The G502 has one of the best sensors on the market. The Pixart PMW 3366DM optical sensor is high-quality and sought after for gaming and precision tasks.
Pro Funcional lift-off-distance lower than 1.2mm can be achieved
By calibrating the sensor with the users mousepad a lower lift off distance can be achieved.
Pro Helps you lock in the feel of the mouse with adjustable weight and center of balance
You can also customize the weight of the gaming mouse between 121-139 grams and its center of balance with up to five 3.6 gram weights to adjust how it feels as it moves across your mousepad.
Pro On-the-fly 5-state CPI switch
It has an on-the-fly CPI switch with 5 states.
Pro Allows you to quickly switch between different tasks with 3 different macro profiles
This gaming mouse can store 3 different macro profiles and can switch between them on the fly. Since they are on-board, no software is required to set the gaming mouse up on another system.
Pro Intuitive software
The software is straightforward to use. It allows you to reassign button functionality, set up macros, profiles and lights, and adjust sensitivity for each axis separately.
Pro Just as reliable as a wired mouse
The G900’s transmitter performs well enough that it’s almost indistinguishable from other wired mice, in some cases even surpassing them in click latency tests. This, combined with its high quality sensor, makes it a great wireless option for a gaming mouse.

Pro Excellent sensor
The Logitech G900 uses a PMW 3366, a virtually flawless sensor that doesn’t alter movement in any way. It is seen as a slight upgrade to the FK1’s sensor but the differences are so minor that any improvement is only marginal.
Pro Great scroll wheel
The metallic scroll wheel can be switched between free scrolling and click scrolling through the button right in front of it. You can also tilt the scroll wheel either way, and program them to a specific task.
Pro Can be used as a wired mouse
You can still use it as you would any other wired mouse if you wish while it's charging, or you could use it as a wired mouse all the time if you prefer.
Pro Lasting and sturdy build quality
Logitech mice typically have above average build quality and the G900 is no exception. The body is made with a rubberized coating that doesn’t scratch easily and is pleasant to hold. The main buttons have a mechanical pivot design that contributes to its precise and tactile button clicks. The cable is braided, which prevents it from twisting and damaging the wires.
Pro On-board memory profiles
You can save your custom button bindings right on the mouse so that no matter which computer you use it with, your profiles are there.
Pro Can be used comfortably by both righties and lefties
The side buttons are removable, so even if you are left handed you can comfortably use this mouse.
Pro LGS companion software conveniently facilitates tweaking
Option tweaking is done via the Logitech Gaming Software (LGS). This includes sensor related options, the choice of side buttons, button remapping, macro creation and thorough lighting control. All of this is connected to the five available profiles. The LGS is available on Windows and Mac systems.
Pro Suitable for all grip types
This mouse is rather flat, without any big humps ensuring that all grip types are welcome, as long as your hands are the right size.
Pro A bundled receiver adapter allows you to improve the connection strength
You can also attach an included receiver adapter to the wire and dangle it close to the mouse to further improve reception.
Pro Flawless wireless connection
Some wireless gadgets may become unreliable at times due to interference from high Wi-FI and Bluetooth traffic. Despite this, the G900 is superb at keeping its wireless connection flawless.
Pro Long, quality wire
To charge the mouse, plug it into the included 6ft braided cable.
Pro Extensive customization
Aside from sensor and DPI adjustments, the G900 features extensive customization options. It has plenty of extra buttons that you can rebind with commands or macros. The scroll wheel can be changed to either free-rolling or notched scrolling. You can also choose to use it as a wired mouse, if you prefer. Full RGB lighting support lets you customize its look to suit your gaming rig.
Pro Convenient charging
The battery lasts between 24 to 32 hours, which is quite reasonable especially since charging it is easy. Simply connect its wire to the mouse and it will fully charge over the course of two hours, during which the mouse is usable.
Pro Sensor customization
The options for sensor customization include changing of polling rate and DPI steps. There are a lot of choices because the DPI steps range from 200 to 12,000 with steps of 50.
Pro Button clicking gives a satisfying feel
The main left and right buttons are built in an uncommon way, mainly to provide a more satisfying feel when they are clicked. Each uses a pivot bar to provide consistent clicking, regardless of where you press the button. In addition, there are metal springs under the main buttons for faster recovery after clicks.
Pro Light mouse for easy movement and control
Weighing 107 grams, this mouse is quite light for a wireless mouse. This is uncommon because the battery usually adds a lot of weight. A lighter mouse is useful since it’s easier to move and control.
Cons
Con Scroll wheel wobbles in free-scroll mode
The free scroll setting has a bit of a wobble in the wheel.
Con Software is Windows-only
LGS (Logitech Gaming Software) does not have Linux or macOS support, so the mouse cannot be tuned or configured under those operating systems. However, if the mouse is configured on a different OS, the configuration will work on Linux and macOS, since the profiles are stored on the mouse itself. (Note that the options for on-device profiles are limited compared to using profile on the OS itself)
Con Made for right handed users only
The shape does not work in your left hand.
Con The braided cable is a dust magnet
Con Placement of button on left side of mouse
The button is directly under the user's thumb so when you try to lift the mouse, you would end up pressing the button also.
Con Only 3 thumb buttons
Not many players realize that thumb- ring finger grip is so crucial for character movement in any fast paced PVP game. With 2 more thumb buttons on Logitech G502 it would be ideal hybrid mouse for any MMO.

Con Heavy middle mouse click
The middle mouse click is very hard to press, often times making you scroll, instead of clicking.
Con Focus windows profiles inconsistent
The feature that loads profile on the files based on the focus window doesn't work well, it sometimes slow to setup, it loses the profile in the middle of a session or it can switch to another profile randomly.
Con Poor feedback management
You will find most of your answers on Reddit by the community that struggles with devs to obtain any kind of usable answer.
Most often devs answers are automatic PR scenario answers to dodge responsibility.
Con Slow software improvement
Con Lose macro at time
When it happens, you will have to set it up again.
Con Dpi Button switches are fragile
Con Too heavy for competitive FPS
Most competitive FPS gaming mice aim to weigh under 100 grams. The G502 weighs 121 grams, which can be further increased to 139 grams with extra weights. The increased weight makes it more difficult to move quickly. It also means your hand will get tired quicker.
Con Can get uncomfortable after long usage due to weight and shape
The mouse weight is already a lot, but for better upward and downward weight distribution, it asks you to insert at least 2 weights in. The shape, however is very much based on hand size and angle preference. Due to its size, it is a bit more comfortable for people with hands larger than the average.

Con The LED behind the G is really bright (can be disabled though)
The LED backlit G on the back of the mouse can be quite bright in a dark room. For users that do not want to use the application that is necessary (or can't, like say Linux users) the light is unable to be turned off. Of course within the application for the mouse the light may be completely turned off.
Con Potential pinning bug
Changing the surface setting in the app may potentially cause random spinning ingame for a random period of time (usually ~5sec). This has something to do with the surface of the mousepad being used and a particular setting of the mouse. In order to address this issue, you can return the mouse back to its default surface setting.
Con Limited thumb buttons
Those switching from the G700 will find that they are going from 4 thumb buttons to two. Yes, the G900 allows for customizable side buttons of up to 2 on each side, but those who like to have more than 2 thumb buttons for gaming (especially MMOs) may find this hard to adapt to.
Con Expensive
Packed full with features, it’s no surprise that it bears an expensive price tag of $150. Spending that much money on a mouse might seem impractical, but you certainly get what you pay for.
Con Scroll wheel can rattle lightly
It is not uncommon that the scroll wheel can lightly rattle while on free-scrolling mode.
