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There's not much difference. The 02's are all anodized, the 03's you had a choice of anodized with a black stripe on top and they had the 03 badge on the side.
If you find a 03 ask if it had the fuel flange replaced. I think it was 03 and 04 that had fuel flange issues, and should have been fixed for free so I would guess most have had it done.