The weight of the rifle will be the deciding factor between the 2. Put side by side with exactly the same bullet grain and exactly the same weight of the rifle, you would be extremely hard pressed to feel the difference between the 2 in recoil. With the .308 being a short action, it will USUALLY be the lighter of the 2 by a couple or more ounces due to the shorter action length. That may well be where you will feel the difference in recoil.