Ok, I went out into the back yard and hit some full GW shots into my net with this ball to test durability and feel. Ball felt pretty firm, not mushy to me at all.
Now, durability seems like it will be ok. My GW is an old Purefit IDraw 51° that can take shavings off of the best premium ball, I put 7 or 8 swings on it and did not see much more then a couple small blemishes. It held up pretty well for that club especially. My other clubs don't affect the ball the way that Purefit does, so I'm guessing it will last for me at least.
Oh, I also compared it to the other premium balls I have in my bag. Dimple wise, like I suspected, the Callaway was the closest aesthetically. Bridgestone, Nike, Titleist, and Srixon were not similar at all.