JDM vs. USDM H22A

Can someone tell me the differences between the USDM and JDM H22? Other than the slight horsepower difference, is there anything else that makes the JDM more desireable than the USDM? Especially if you would do a complete rebuild with new cams, etc anyway?

Just wondering if it would be possible to save some of the headache of wiring issues, etc and go with a USDM instead of the JDM motor/tranny/ECU.