Well i reached out to Falken with LT vs P XL tires question and for those interested here is their answer:
“Thank you for reaching out to us regarding the Wildpeak AT3w and the tire size in question. Across all sizes, the Wildpeak AT3w contains a two ply sidewall, with the count of material in the tread section varying based on standard load, extra load, and LT spec.
The non-lt 245/75R16 can be suitable for off-roading as long as the tires are aired down to increase traction, durability/puncture resistance. They also have less tread to start with initially, though the weight savings over a LT size outweighs this, which would help in vehicle performance and MPG.
The Wildpeaks do not contain a cut/chip compound that would be durable against frequent gravel, shale, and other abrasion off-pavement surfaces. However, a tire with a cut/chip compound, as it needs to soft to resisting gravel/shale wear, will wear out faster in terms of mileage.
Most, if not all, modern day all terrain tires contain anywhere from 1-3 plies on the sidewall, which is derived from the tread area of the tire. As a non-bias ply tire, this allows users to have comfort for day to day driving. Once a tire has 3+ sidewall plies, comfort/ride qualify suffers as the tire doesn't flex as easily to absorb imperfections.
A bias ply tire would contain the corresponding amount of plies per letter grade (C, D, E, F) through the tire (tread and sidewall). However, bias ply tires are known to be uncomfortable, rough, and hardily livable on a daily basis.”