ExitHaven't used my Revel much yet but so far first impressions are very favourable. M1 and M2 feel great, not too light that I can click them by accident but not too heavy that I feel like I am having to push down with any real force. Side buttons feel ok (I can see why some aren't keen but I quite like them/rarely use them). Tracking seems good but I haven't played any FPS games yet which is where I will notice the difference, having said that I am moving to from a generic £7 mouse as my gaming mouse broke 6+ months ago so anything will be an improvement!
Hopefully get some gaming in tonight :)
It's a variant with consistently higher quality control according to people with both. (better clicks, better mousefeet etc.)