Can anyone tell me if there are any major differences between the two, other than the ski stance and track length/lug hieght. I am thinking about new M but I am disapointed the shortest I can get it in is 153. The crossfire is now uncoupled. Is it basicly the same suspension found in the M, with shorter rails?? I do mostly tree riding/boondocking and like to do some jumping. I realy don't want or need that much track. I am wondering if a crossfire would fit my needs a little better, but I want the deep snow caracteristics of the M. Thanks for any input.