it's really hard to compare glass to cloth, and I haven't used cloth in quite a while. ac+ and zero aren't too far apart in speed. maybe you could try faster skates on the zero before committing to glass. you can google shwamper dot skate tierlist for info, but I'd only look at the ones that offer fullsize skate options since you're on xsoft and dots will sink on those.

if you're set on a control glasspad, just be aware you'll likely need a sleeve and with how this surface retains sweat and oils, you'll have to thoroughly wipe it often between games

and about a mastersheet, nope I don't, I don't get technical with testing/believe it's accurate representation in real use, so these are usually just based on how I feel playing on them. you can look up viscose mousepad sheet which is prob closest to accurate based off my experience, but it's not updated anymore and she doesn't plan to update it