TOAA vs TOBA
So this is going to be a bit speculative since we barely know anything of the characters, but I'm curious as to what people think at this point. I'm expecting one of two answers "stalemate," or "TOAA wins."
Currently I'm on the side of a stalemate. My reasoning is that both have been described as all-powerful in the same manner by the same writer.
From The Ultimates v.2 #100.
From The Immortal Hulk #25.
Edit. This is not TOBA-possessed Banner, but the entity that according to Ewing is "below Oblivion."