You can look at the Arctic Cat site, the 700 has a rear diff. that has what I believe to be "limited slip", meaning it can turn sharper and not tear up the turf as bad. From what I heard the lock diff. switch on the dash locks both diffs. This info was not from the dealer. The dealer is at Bass Pro (Tracker Boats), is very low key, low pressure, and best of all, no freight, set up, or other BS fees.....just state tax and doc fee ($35), this alone saves me $700-$1,000 over motorcycle dealers, especially in Las Vegas (they act like car salesman). I think I'm sold on the XTX, just the EFI alone is probably worth the $700. I just wanted to know if anyone else thinks so, Thanks

Which one to get; XT or XTX?  If I add aftermarket exhaust or air filter will I have to reprogram the ECU? Why does the XTX have a lessor rear cargo payload, and would this present a problem with adding a rear seat/passengers?  Thanks