Portman in 'Black Swan' or Lawrence in 'mother!'?

This is a tough one for me. Lawrence was easily my favourite thing about mother!, while I find Portman kinda overpraised while still being good. Lawrence suffers from having a pretty thin character to work with, and for a good chunk of the film it feels like all she's doing is looking confused and moaning "hey, excuse me". Still, I'd say I found her to be stronger on the whole, particularly towards the end.