Michelin and Goodyear have dozens of lines of LT/P tires for trucks/SUVs/etc. It makes a difference in tread type/compound your using so across the board they all don't wear the same.
What line of those brands are you using.
And of course driving style is the biggest hit. My last OEM Michelin LT265/70-17 E LTX on my current 2500 Dodge/Cummins NV5600 tranny 3.73 gears ran for 115k miles before the tread bars showed, pulling various trailers up to 16k lbs.
City driving is hard on front axle tires vs rural driving where I live.
Using tire pressure for the load when empty is another player.
And of course like wizard says size also can make a difference.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides