SFSTL B:TR is smoother than SFGAM by a hair, but it lacks the scenery and ride experience that you get at SFGAM. Aero737 summed it up pretty well. The que line at SFSTL is horrible as well. You have to hike back through the majority of the line when only a small portion is actually holding people.
DVG - When you go try to sit in the seat closest to the airgate in the front row.