I think this battle is a lot more close in Asta's case than people think IMO
Asta vs Deku (Equal stats)
Stats equalised is a bit of a sketchy statement. Im going to take that to mean speed, durability and tier (country level, continental etc) are now equal. In which case, Deku beats him. OFA being able to almost level continents (in this scenario only, not in the anime) with the only repercussions being a few broken bones means asta is screwed. Air force can take care of any long range magic attacks, and if you want to make an argument for Black Divider, Dekus experience with Stain, plus his new danger sense means that swordsmen won't be a problem for him.
However, go back to the actual power level of their respective verses and Asta solos mha.
(Open to corrections and contributions)
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