HUGE difference. A Sunl you would expect some things to go wrong, it's a Chinese brand. Nothing wrong with that, just China doesn't have the same quality standards. Can am is one of the most pricey quads out there. If I paid that much, I better not have any problems. My TRX is the cheapest of all the 450s but hey, it has never seen any down time due to it needing to be fixed.