ive owned the Jammin X2, Jammin X1 and hyper 7 and by far the jammin X1 is the best out of the three. the x2 simply sucked, hated it. most parts are interchangable but the X2 parts wore fast and the buggy itself just never felt right, spent 6 months on setup trying to get it to work and ended up converting it to an X1 again LOL ... X1 was durable as anything and worked very good and was easy to drive. the hyper 7 was ok but thats about it, its a basher IMHO, the jammin X1 will make a better basher though IMO, but if you plan on racing then the X1 very capable of winning too