i think it actually makes a difference is u have AUDM h22a or JDM h22a plus, the gear ratios are different between both spec engines. JDM being better in all area's including ecu which is tuned for jap spec fuel but will run fine on optimax/ultimate plus has different fuel maps etc.

I think most AUDM h22a's are 190hp where the JDM h22a of the same age is 200hp.

it think the later model AUDM preludes are 200hp , not sure

ive driven 99 model prelude vti-r with manual tranny and then i drive my JDM h22a in mah accord and i can say my accord is quicker. some JDM h22a's have factory LSD which is handy if u want to take off fast!