One of the most theoretical openings. Who’s better?

Are you talking about my analysis? There is also 15. Qc4, which another try.

I think black is better

I am not sure if white has a compensation for the pawn they sacrificed

It seems that black has a pretty solid position

I always find it strange that black goes Ba6 and then Bb7. I don't feel like the white queen is misplaced on c2 at all and it just seems to give white an extra tempo.

sus

If the queen was on d1, d5 wouldn't be a pawn sac instead it would be crushing positionally

I don't know about that, Bb4+ and Bb7 are both very playable for black. Besides, black doesn't have to allow d5.

I meant if Bb7 and then Bg2 c5

Then c5 would definitely be a mistake of course, but I think black has a very good position after Bb4+. I generally play Bb7 in these positions but I appreciate the insight into the Ba6 line.