let me rephrase that then.
would a jdm ej205 with 9:1 CR give much better gas mileage than a usdm with 8:1??
A jdm wrx has less lag and gets boost faster and easier than a usdm because of avcs, higher CR etc etc....would a usdm with a vf34, supporting mods and a tune be able to match a jdm motor in terms of response (as little lag)?? considering the vf34's ball bearing turbo.