Well, there are more than one type of dual round tip as well. The original tips on my '03 S are matte finish (like the Boxster S emblems) with a part number of 996.111.254.00, whereas the tips that came with the PSE are polished with a part number of 996.111.254.01. The style is the same, but the finish is definitely different. They are interchangeable by just removing one bolt.
Soooo, now it gets even tougher.... 
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'03 S, manual, 18" Carrera wheels, PSM, PSE, Litronic, 996 Cluster, +
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