As was stated, there is no strength difference. A lot of people assume there is but all the important dimensions are the same. Cylinder diameter, frame dimensions, etc.. The only significant difference is the grip frame and the weight it brings and that has a drastic effect on feel and how it handles recoil. For me, the Colt SAA/Navy/XR3 grip frame is good up to 250/1200fps and then only sparingly. The SBH works well with heavy loads as long as it's fitted with custom grips. I shoot this one with the Buffalo Bore 340gr load no problem.