Logitech G400 vs Logitech G502

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.

With the press of a button, the scroll wheel will go from regular clicking to smooth free-spinning so that scrolling through long documents or webpages is a breeze.

With the setup utility, the 11 buttons can be mapped to any key sequence. With 3 possible on-board profiles, and even more profiles stored on the computer, you can use a different setup for every program.

If you want to change the weight or balance of the mouse, it comes with several that you can insert in the bottom of the mouse.