Static and Dynamic Displacement and HP

I started off on the wrong foot here. Rat Bastid helped me out a bit. Are we starting with heads set up for a 360" or 408"?

What I'm trying to get at is the conventional wisdom here is if built same/similar the larger cid gonna always make more peak and under the curve hp and if this true I can't see what stopping the smaller cid spin up to catch up and make similar power since the top end is obviously capable. Everyone says it obvious and been explained to me a million times and I must be really dumb cause I haven't seen it or get it.

For the eg. It shouldn't matter as long the similar level.