I have owned trucks with both the Goodyear 1400 x 20 and the Micheline XL. Personally, I like the XL better because it has a more aggressive tread pattern. I can say that my experience has been that the Goodyear tire wears better over the road, though. I have been told by guys that sell tires to the military that the Micheline XL has a higher off-road rating. Since I don't drive my trucks regularly, I have opted to go with the tire that I think looks better, but, if I was driving it regularly on the highway, I would probably go with the Goodyear tire.
Good luck,
Bruce
Olney, MD
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1991 M149A2
1989 M932A2
1989 M925A2
1989 M101A2
1988 M977
1988 M105A2
1987 M1045
1987 M105A2
1985 M1009 (3)
1970 M149A2
1964 M129C
1963 M332 (3)