But those aren't Cat certified combines with CAT logos like on the lEXION and the MT 700 and 800's, there is a huge difference! The Challenger 660 and 670 are nothing more than Massey's with Cat engines, you know that. Anyone can go to just about any truckstop that services Cat engines and get the same logo as the one on the Massey_Challenger combines. Mentioning a Challenger combine and a lEXION combine in the same breath is absolutely sacreligious and I can almost promise you that you won't find too many Cat dealers making that mistake anymore.