I have owned 3 2nd gens...with a 4th on order
07 DC SR5 SB
10 DC TRD OF SB
11 DC TRD SPORT SB
13 DC TRD Sport SB(being built in Baja...)
Ride on the TRDs better but IMHO the biggest comfort coefficient is the TRD seats. I've never found lack of bed with the short bed that just dropping the tailgate didn't solve... just my two cents...