i'v got the JDM h22 head ported and polished with oversized valves and crower stg 2 cams w/ stock idle lobes....

now i am wondering if it would be worth it to get the jdm bottom end? i mean i keep reading these threads and seeing dyno's of how the jdm h22 more power considerably....i mean what makes the jdm h22 put out so much more power? i know the CR is 10.6 on the jdm h22 but is that the only thing?

if i get the jdm h22 bottom end then i would have two motors so incase it blows ill have a back up engine....what should i do?
also i can get the S2 IM and just keep working on the head more and bore out TB too..

any help is appreciated thx.