some differences are rather small some are huge. i cant post any pictures of the two someone eles should. but the differences are in the chassi, most noticble would be the drive chain motor position and batteries. as for the upgrades some are interchangeable some are arnt. tires rims and body tops are all interchangeable. but things like motors suspension and underglow are not. there easy to tell apart once u take a good look at them and your xmod.
i would think that they would be availiable in canada, if not at stores than im sure some one or some online store could ship out to canada...its not that far away