Considering Logitech has been making great mice forever, and THAT one is excellent (I have one), Logitech for sure. Corsair has gone down the "cheap Chinesium junk" rabbit hole, and I won't touch most of their products these days. But that's one very biased anti-Corsair opinion.
JD has come good points that the 502's do have some sharp edges and unnecessary groves and edges that do space out the buttons more than the need to be and the transition from button to button isn't as smooth. Also, depending on if you live alone or will be gaming close to anyone else - the 502's mouse "click" is quite loud. I joke and say the 502 is the mx blue of the mouse world
All that aside - I also have 2 that I use 1 at work and 1 at home and love every bit of literal mileage they have on them and god knows they've covered a lot of ground lol.
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