Can anyone tell me whether the 1997 MY98 and the 1998 MY99 WRX use the same clutch and/or flywheel?

I looked up the parts for both cars on http://opposedforces.com/parts/impreza/en_g10/ and while the part numbers are different for each model, the clutch page listed the one from the opposite model as a substitute part. The flywheel may be compatible, although I got a 404 error trying to chase up the two different part numbers.

Thanks for any help.