As other have said the 60 is close in size but not all guns are created alike , Ruger uses investment casting vs S&W Forged castings .
Investment casting is stronger but has never really been a problem as long as your using the recommend ammo for your specific gun .
S&W lost a lot of buyers when they added the lock mechanism , Ruger always stayed with a Traditional look and picked up the S&W guys that were turned off by adding a stupid lock to there revolver , they lost a lot of money and should have offered 2 models one lock and one no lock and after a year see which one out sold .
That SP101 is very nice I have 4 of them , the rarest a SP101 in 2 1/4 barrel in .22 its same frame as the .357 but more weight .
I’m a Revolver junkie and have more wheel guns than I can count .
Rugers are nice , S&W are Purdy and Colts are plain gorgeous.