There is only 1 hands free Segway in Sweden what I know of and that one I have lots of expierence with, and that one is an old version Segway with the pedals
However what I've learned from a friend who sells these i2 and x2 is that i2 have the same prestanda but it's more alert, but I think it is as you say maybe take a look at both and see the difference, but problem for me is that closest dealer is 1000km away