polaris sportsman 335 question….’99 or ’00?

Hey guys (and gals),

I have been doing a rebuild of a polaris 335 I purchased cheep a few years back. Quick question….

I am having trouble identifying the exact year/ model seeing as the serial number is no longer visible. Stickers have been removed and the serial number which is supposed to be on the frame has been "rusted away". The man I purchased it from told me it was a 2000. I recall somewhere on this forum reading the 99 and 2000 had different tire sizes. Can anyone offer me any identifying factors to differentiate between lets say a 99′, 00′, and 01′ polaris sportsman 335? Also, when I look at sites like Partzilla they seem to say there are different models to choose from for a 2000 polaris sportsman 335…

A00CH33AA SPORTSMAN 335
A00CH33AB SPORTSMAN 335
A00CH33AC SPORTSMAN 335
A00CH33AD SPORTSMAN 335
A00CH33AE SPORTSMAN 335
A00CH33AF SPORTSMAN 335
A00CH33AG SPORTSMAN 335

…. any idea how to identify this. and more importantly, is there any real difference in the parts between these?

Thanks in advance,

Logan