I have a friend that is looking at a boat with a 200 Mercury Fourstroke (non Pro XS). From my research it appears that the difference is upper RPM range and possibly a gearcase. Are there any other significant differences? The boat is a 2021 Pantera Classic if that helps. I do not have a serial number as the boat is listed for sale and he hasn't gotten the detailed info yet. Thanks for any help or thoughts you can provide.