h22 is just the short name for the engine cuz its just faster to say than h22a.

The h22a is the jdm motor that depending on the year has either 200 or 220 hp.
If it has like h22a1 or h22a4 or something like that, those are the usdm motors that again, depending on year, have 190 to 195 hp.
I believe torque stays relatively the same throughout all of them, around 156 lb/ft give or take a few i think

I think thats right