I have a pair of the OG UB's which I wear casually (but run in from time to time) and I tried the AlphaBOUNCE shoe...definitely impressed with the Bounce foam. Adidas has the cushion and comfort game on lock right now and it's not even close.
i really hope i dont sound like a nike stan when i say this but comfort/cushion isnt new in these types of sneakers (runners) and although ultra boost get my top rating plenty of nike shoes and other adidas shoes come pretty damn close. so much so that it often comes down to aesthetics when its all said and done. if we use the ultra boost as the standard and give it a 10/10 then rocket boosts, pure boosts 1 and 2, y-3 retro boosts and pretty much anything with a full boost sole will give you that comfort youre looking for. on the nike side youve hot og huaraces and the nm's, presto's if you dont have wide feet, sock darts, and pretty much anything with a thick phylon sole gives you pretty damn near boost level of comfort.
that said the alpha bounces feel just as good as my huarache NM's and i rank them pretty high