The surface is a little different from the G5, also rough but in a different way, one has to her but genuaso good grip as the G5, for one or the other that something changed surface is but one probably. some getting used to, even though I really had no problems with it.
The additional weights like one or the other one probably. some nice gimmicks offebaren, all in all, but only a small Accessory that you can grab on a LAN in addition to the mouse pad to show off in front of the gamer colleagues a little.
The laser is like the "predecessor" super, is indeed almost the same. Well actually you needed as say those who know the G5, has plays with her / worked or they themselves had not much / has can safely access here, the extra thumb key is to buy one or the other probably not worth it, you should definitely but superior to the model to be faithful or rather the shape of the mouse then the refresh is the right and in my opinion the best choice.