Well, it is a cylinder. For a honda. It has a similar bolt pattern for the reed cage. There are boost/auxiliary/boyheson ports. Hell, I'll bet they both take a piston........ Haha
Seriously, I think I see some vast differences in the two. The ESR takes the contour for the auxiliaries all the way up, but IMO it's kind of a really lazy contour. I'd love to throw smoke at it to see what the air does up in the upper corners of the intake. I bet it kinda runs in and does a few cyclones and slows down and sorta limps it's way back down to the auxiliaries.
Normally I'm not in to knife edged shit, but I see how you are working the angle there on your's and that set up works on the Hondas. There is some real velocity being created there with low turbulence.