There are Differences, like all Pro XSs it has the Reeds,PSI is upped, and the cool stickers….you will not see ANY performance difference…BUT guys there is NO MORE 200 Optimax in a 20inch version, NONE, all they make is the 200 Pro XS. Now if you find a non current 200 then you may see a price difference, but on a BCB ALL 200 Optis are Pros….And Im sure in studies their may be a hair of a MPG difference, the regular 200 was already about 220hp, 210-220 at the prop….Your Signature …