My brother in law who I ride with has a 94XP, I drove his one day and wow. What a peppy nimble machine. The 94 has the 657x engine, not sure about the 93 without looking, I believe it’s the 657? At the time I didn’t have an X4 hull machine of my own, I was riding one of my GSX’s, Wet Jet, or My GTI. I have since gotten my 95XP 717 running and just about restored and it is now my favourite machine. Just a note that many will refer to the 94XP as an X4 hull when in fact it is not, probably due to the very similar appearance other than the Color of course. I also found that his 94 was a bit more tippy than my 95. My 95 is a hair faster but as for fun factor, relatively no difference between the 2. As for the 96XP with 787 I couldn’t tell you, I have 2 here but that’s a future project.