We bought one of each. The S2 is for taller people from five foot eight and up and the X2 is for smaller people. Same configuration same bike, they just lowered the top tube. As far as I can see these bikes are awesome. We love them we're getting on in years and road riding is increasingly...
Love my VM ES2 - minor issues that required easy fixes. the rear carrier rattling against the fender, replaced the pedals, the seat and the grips. All good, working perfectly. Posting because I don't think there are many in this group yet.Bought my wife an X2 also. The car is lonely, as it sits...