I haven't done a lot of muddin with my H3 but I did pull a stuck F150 through a spot a Wrangler had been stuck 30 min prior. I think alot has to do with weight of vehicle, depth of mud, type of mud. since you state you and buddies running same size tire maybe you are sinking more and they are getting more flotation and moving on top of the mud where your extra weight is bogging you down and the mud depth is too deep for your tires to find anything to grip or they are contacting solid bottom but it is slick clay so no traction. when I drove where the Wrangler got stuck that problem was he had wide flotation tires und the mud was like oatmeal so he just churned the mud where my tires and weight cut through to traction on solid ground in the soup.
