I think Andrade looks more powerful than she is, either that or Hill has a massive chin.
I believe it's more so the latter, but overall I feel Andrade has the highest power output relative to JJ's previous competition. I don't see KK, Claudia, Valerie, Penne (lol), Esparza, or Lima delivering a harder shot than Andrade from what we've seen.
I could be wrong though...I mean, the best we can do is go off observation of who seems like they can crack since barely anyone gets KO'd at 115 (in fact, those 6 fighters have a combined 0 KO's and a few TKO's). Andrade definitely seems like she packs a shot at that weight class, though.