I suspect the reward is the same, but I'm just guessing. Also, max quality doesn't impact all items (yet) - last I heard the only ones that actually had a visible benefit were harvesting tools, who become "Pristine Toolname" or some such. I've not been able to make any of those yet but I did make a 100% copper dagger yesterday which, when compared to the 75%+ other one I made showed no differences at all.
Lots of things are still changing pretty frequently though, so the max-quality effect may be spreading faster than I know.
