Those are different tires. The Michelin Defender LTX is an all-season. I wouldn't use these for off-roading.
I have the Cooper Discoverer AT3-XLT in 305/70-17 (34") on 17" Raptor wheels. I do have a very mild lift (about 1" all around) and have had to trim the inside of the fenders (plastic only - no metal). I disconnect my sway bars when off-roading, so my suspension does see greater-then-normal amounts of flex. I tow a 6500 lb travel trailer with them at 65psi (max for the 305mm Load Range E size) and off-road at about 20psi. They do very well in the rain compared to my Nitto Exo Grapplers. They are marketed as good rain performers vs other all-terrain (not all-season) tires.
They aren't the most aggressive off-road tire (I've also had Nitto Exo-Grapplers which had better grip on loose dirt, steep climbs), but they would offer much better protection from off-road hazards (sharp rocks) and better off-road grip than any Michelin, and they are surprisingly VERY quiet on-road.
If I had a 4x2 and NEVER went off-road, I might consider a street tire like the Michelin Defender LTX, but I've always found Michelins to be a bit over-priced for the level of performance they offer. You pay a premium for brand recognition / reputation. For other cars, I've owned Yokohama summer/intermediate, General all-season, Sumitomo summer, Good Year trailer & summer, Bridgestone summer, Nitto off-road, BF Goodrich summer tires and have never had any structural or quality issues with any of them. I've just never bought Michelins because they're just not worth the premium.
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