I agree, seems like when larger makes more hp it's at a low hp per cid gain. More top end is a better way.
I'm still mixed on that, I think it's wrong or at least misleading to for most people say/think displacement adds hp especially it's automatically gonna add hp. It seems at times similar builds the larger one makes a little more for whatever (I think for secondary reason) 1st problem what is a similar/same build between different displacements.