LT vs P rated tires (Revos)
(Newbie alert...

My first post to this forum)
Does any here know if there is any difference in a LT-metric vs a P-metric tire of the same type? Especially in the sidewall toughness?
I bought a '99 LC a few months ago and it had new Bridgestone Dueler A/T Revos on it in the stock (275/70R16) size. A couple of weeks ago I was in Death Valley and tore an inside sidewall.

I had the tires aired down to about 24 psi and when I went back to look at what might had done the damage I didn't see any particularly sharp rocks. The funny thing is that the hole didn't look like a puncture, but it looks like a chunk of sidewall was just pealed back.
The Revo's in the stock size are P-metric tires and stamped on the side is a 2-ply rating for the sidewall. The 285/75R16 size is a LT-metric tire and has a load rating of "D" which is supposed to translate into a 8-ply sidewall rating (even if there are not actually 8 physical plys). I'm not sure if that means the sidewall would be tougher, especially in an aired-down situation.
Now the logical / economical thing to do is just replace the damaged tire. The rest are in great shape. But I don't want to get stuck out in the backcountry with a torn sidewall. It kinda put a damper on the rest of the trip knowing you're running on the spare tire and the next sidewall tear would put you in deep-

... I had brought a plug type tire repair kit and a compressor, but could not do much about a torn sidewall.
Plus 33's would look good on the truck and give me that extra inch of clearance. ;p But we're talking about $200 for one tire vs $1000 for five.
Any recomendations for a tough tire? The BFG A/T KO's mention that they have "Maximized aired-down" traction, which sounds good. The Nitto Terra Grapler's website has very little information. I think I'd be happy with the Revos if I could confirm that the LT sidewall is tougher.
Anyway for those of you who know Death Valley... The damage happened on the Goler Canyon->Mengel Pass->Butte Valley->Warm Springs Canyon road. The next day we went down Lippincot road and out the Saline Valley South Pass without incident.
Thanks for any input !