Firebird Formula VS Z28 SS

I know that they are pretty GD similar, but can anyone tell me the differences? 2002's btw!

Camaro (http://www.autotrader.com/research/model_info/modelinfo_overview.jtmpl?year=2002&make=170&model=Camaro&vehicle_number=N8841&restype=used&x=50&y=4)

Firebird (http://www.autotrader.com/research/model_info/modelinfo_overview.jtmpl?year=2002&make=460&model=Firebird&vehicle_number=U19516&restype=used&x=46&y=16)

SS's could be optioned with higher hp as well. The only way a formula could have the same hp was if it was modified into a formula Firehawk...