well the one thing i've learned is. there is no wrong motor to do boost.
the vtec motor may have a lot of over lap on the top end, but that doesn't mean you won't make power.
that same charger would make more hp out of each lb of boost cause of the high compression b18c1 or b16a or b16b or b18c5 or whatever. so does that mean the b20/b18's suck? higher potential comes from the vtec motors there is really no denyin' that.