Well, that blows my theory.
To your point, yeah, they're both gonna be PC. But call me crazy, I like the ultimate solution better: Cap beats the crap out of him.
For that matter, maybe it reinforces the idea of bias reflection. Cap 'prime' is cap as the author actually thinks he should be: the Fighting Democrat. The Ultimate line may be showing the authors view of our world as 'spoiled'; thus everyone is more violent, generally more 'bad.'
It probably depends on your particular faves. I never cared one way or the other for Ant-Man/Giant-Man, so if the writer wants to make him a whipping boy, c'est le vie.
On the other hand, they finally upped cap to where (I guess) I've always wanted him to be: a kick ass fighter and tactician. C'mon, the guy kicks the Hulk in the stones, for cryin' out loud.
I'm not saying the Ultimate line isn't PC. Ye cats, if you like comic books, is there any venue that ISN'T PC? I just get the impression the writer is trying to pull a Norman Lear: I'm supposed to dislike the new Cap, 'cause he'll go out a kick somebody's ass for beating on his wife. Me, I'm disturbed enough to like it.
Hey, I read Matt Helm novels in my younger days. They've scarred me for life!