Yep, there's two styles.
The '98 "E0" cars had a Cosworth-style five-
spoke wheel with slightly rounded spokes and
a center cap that covered the lugs fully. The
wheel is around 20-21 pounds.
The '98.5+ "E1" cars have a Cobra-style five-
spoke wheel with slightly tapered spokes and
exposed lugs. They have the round black SVT
center cap, and weigh around 19 pounds.
I personally prefer the smoother and chunkier
look of the E0 wheel. Easier to clean, too.
T.