The shouting isn't what makes it wuxia for me, though, as that is dependent on the author. It is the power system and it's focus on martial arts techniques. I saw an answer to a question "wuxia vs xianxia" somewhere that answers the question on what the semantic difference between xianxia and wuxia is. Wuxia means (literally) "Martial Heroes", whilst xianxia means "Immortal Heroes", and to me, AC is wuxia, while POMA is xianxia, therefore it would be unfair to compare their power systems.
What we were referring to in this case was the mcs' overall power in their world(s) or realm(s). Whilst POMA supposedly ends on a blank note which leaves the mcs' future up for interpretation (depending on whether niki decides to continue it or not after book 3, or give us an epilogue that tells us what happens in the future of our mc), AC supposedly ends with us being a big fish in a small pond (which as I said above, I thought implied we would be supreme in our region but not the whole world as wuxia is typically contrained to one world, not always). This is all just my understanding of it though, which could be wrong.