It depends. A dressage saddle is often more comfy for a western rider because you keep a longer leg. However, if you are going to be in the saddle for hours, you might either get an AP or a dressage that has a more forward slant to it, just so that your leg is not forced into too much of a vertical position. You want to have some freedom to move around if you are out on the trails. Also, AP saddle usually have some D rings to tie things to, and dressage saddles rarely do. you will also be more likely to find a brown one in AP than in dressage, though they do exhist.