As far as I know, there's nothing different but the year. I've seen Teggy's seperated as follows:
94-95 obd1
96-01 obd2
96-99
00-01
94-97
98-01
I don't understand why the years are split like that. The only thing I can think off is for cost on parts. You can have a 2001 Teggy and need a valve cover gasket and order one from a 94. The part is the same but the price is different. It's weird how car companies work out sometimes.