Differance between 93-99 and 00-03

I just bought a 2000 Cabrio automatic 2.0 liter and wanted to add a better air filter system to it. I found several cold air intakes form K&N and Nuespeed for the 93-99 models but was told it would not work on a 2000?!?!? The engine bay layout is the same and the engines look to be the same. Can anyone clue me in on what is different between a 1999 Cabrio and a 2000 Cabrio.
Thanks
Topfuel7