The big motor in the m2 is the 300 Cat I believe, the Columbia 450 is an awesome motor. Cost difference is about 15K I believe. I like the columbia nose better than the bigger m2 nose, nicer visibility. The m2 is basically the replacement for the FL series, some m2's see duty as single tractors with light loads. The CL is a heavier duty chassis and can tow up to 40,000 lbs.
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