The G502 has that great spinning scroll wheel that the MX Revolution had.
Meanwhile, my wireless G602 still lasts for months on its 2xAA. Man, I’m so glad I replaced the shitty 2-day battery life of the G700 with it.
I love the feel of the G700 better than the G602, but I agree that it’s not meant for full-time wireless. My son has that one, and I’ve been looking at the G502 to replace mine (a CM Storm Sentinel Advance II that just didn’t hold up). Seems nice, and while I don’t have a need for a fly wheel, it seems like a well put together mouse, and hopefully it will evoke the warm feelings I had for my old G500.