Logitech G400 vs Logitech G900 Chaos Spectrum

The Logitech G400 gaming mouse was clearly designed specifically for palm grip.

There is a built in ergonomic thumb rest so users can rest there thumb instead of constantly gripping.

The two side buttons are located in an easy to reach, unobtrusive position.

The Logitech G400 gaming mouse is based off of MX518. It has a few minor incremental improvements that don't change what made the original so great.

The mouse has an accurate Avago ADNS-3095 optical 3600 CPI sensor. No angle snapping, no acceleration, no prediction.

Above and below the scroll-wheel there are buttons that allow increasing and decreasing between 400 and 3600 CPI on the fly.

High quality rubberized coating is used among other materials to give a quality product feel.

CPI can be changed from 400 CPI up to 3600 CPI without having to interrupt workflow.

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.

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.

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.

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.

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.

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.

The side buttons are removable, so even if you are left handed you can comfortably use this mouse.

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.

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.

You can also attach an included receiver adapter to the wire and dangle it close to the mouse to further improve reception.

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.

To charge the mouse, plug it into the included 6ft braided cable.

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.

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.

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.

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.

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.