At one time I did a complete survey of every commercial loading of 10mm, .357Mag, .40S&W and .41Mag on the web that listed velocity specs. That was awhile back--now it would take forever, but back then there weren't nearly as many ammo companies listing specs online. Anyway, that's how I came to the conclusion that there wasn't really enough difference between the 10mm and the .357Mag to make a hill of beans. Also that the .40S&W was a considerable step down from either the 10mm or the .357Mag.
And finally, that the .41 Mag, a few very light loads notwithstanding, was in a completely different class than any of them.Correct. And the only reason that it does is that there are a few very light .41Mag loadings out there. The .41Mag is a far more capable cartridge than the 10mm.