Thiers only a few things I'd look at a b18c1 over a h22. And thats the fact that, if you're looking for parts for it, then it will be easier to find them for the gsr motor, rather than the prelude motor.

A h22 is quick, but I do believe you could push a gsr motor a bit farther. I'm not totally sure about this, so maybe other people who post will correct me.