When comparing Logitech G602 vs Cougar 450M, the Slant community recommends Logitech G602 for most people. In the question“What is the best gaming mouse?” Logitech G602 is ranked 15th while Cougar 450M is ranked 47th. The most important reason people chose Logitech G602 is:
Great for palm grip along with a the fantastic logitech software for key mapping and profiles.
Specs
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Pros

Pro Comfortable for palm grip with easy to hit buttons
Great for palm grip along with a the fantastic logitech software for key mapping and profiles.

Pro Great battery life
Good for users that want a wireless mouse without any loss of functionality or need to change the batteries every week

Pro Good optical sensor
Only up to 2500 DPI but it's a great sensor for those that don't need very high DPI.
Pro Can run on single battery for lighter weight
Users can opt to run the device on a single battery to cut down on the weight but this will have an impact on battery life.
Pro Resistant braided cable
The cable is braided so it doesn’t bend easily.
Pro DPI button binding can be configured
The DPI button, which is located on top of the mouse, is actually a profile changing button and can be tied to button configuration or lighting options.
Pro Long list of customization options, for a budget mouse
This mouse has some basic sensor-related customization.You can modify the polling rate, DPI amount, lift-off distance and even angle snapping. The angle snapping is an on/off choice instead of a slider. Its UIX companion software has an extensive list of customization options, notably long for a budget mouse. It includes lighting options, button rebinding, macros, DPI changing, multiple profiles and several other smaller features that even other non-budget mice don’t have.
Pro Good performance for fluid gaming
The Cougar 450M uses the Avago 3310 sensor and presents no jitter, acceleration or smoothing. The DPI choices ranges from 50 all the way up to 5000 with increments of 50. For this sensor, every DPI step of 50 should work equally well, so you don’t have to worry about keeping track of native DPI settings.
Pro Easy to manipulate
Being an ambidextrous mouse, it avoids unconventional shapes and stay true to the classic mouse design. To facilitate control and finger grip, it has a slight incline located at the side and its sides are covered in textured plastic.
Pro Good for left hands and right hands
The mouse has an ambidextrous design, making it a possible choice for left-handed users. It also has extra buttons on both sides, so they can be used on both use cases.
Pro Sensor is able to reliably track precise movements
It’s Avago optical sensor is a solid performer recognized many mouse enthusiasts. You can rely on it to track precise movement without worrying about acceleration or jitter.
Pro Great value
Despite the low price point, this mouse still maintains a respectable list of features. It has a good shape, reliable sensor and plenty of customization options. It bridges the gap between low cost and high quality while still being well built.
Cons


Con Somewhat heavy
Being that this is a wireless mouse there is the battery weight to contend with. Batteries in the weight of the device is 152 grams, which isn't all that bad considering but still not for users that like a lighter mouse.
The mouse can also be used with a single battery, which is useful for not only reducing weight but also for balancing the mouse. With two batteries the mouse can be a bit slipper on the right side when picking it up as the pinkie and ring fingers don't have as much to grip - but balancing the weight over towards the thumb allows the mice to be more easily picked up as the side buttons allow for a decent place to grip.
Con No wired option
The Logitech G602 does not offer a wired USB option, only wireless.

Con Macro Key Defect
Side buttons are known to register multiple keystrokes occasionally when pressed only once. With bindings such as Ctrl+F4, this naturally has destructive results.

Con Middle mouse button wore out after a year of heavy use
And with no way to open it it's near impossible to fix.
Con Minor sensor rattle can be slightly annoying
There is some minor sensor rattle which is common with cheaper mice but otherwise has no effect in performance.
Con Companion software is only available for Windows
The UIX companion software is only available for Windows.
Con Feels somewhat cheap and gets dirty easily
The body of the mouse is covered with smooth, glossy plastic that feels cheap and can easily get greasy from sweat after prolonged use. Some people might find it uncomfortable to use and a hassle to clean often.
