I've carried 38 snubs [ 36 and 60's ] at times over the last 20 odd years. Still have the 36.
If I am going to carry a snub these days, it's my 640-1 357. Yes, it is heavier, the cylinder is longer, the length of barrel is longer [ but not by enough in any of them to matter ].
I stoke it with 357's, not 38's. The 357 may not get the full potential from the short barrel, but it still has more ooomph than the 38's do, and more energy at the threat than the 38's do. I carry it for possible SD, so the more oomph I can get out of it, the better in basically the same package.
I also have a model 65 357 and that gets a very steady diet of 38's for practice, and barely a 357 goes out the barrel these last several years. It gets cleaned when I feel like it, and if I stoke it with 357's and it's dirty, it never has balked at it's previous diet of 38's, and just runs like it is supposed to.
The 640-1 is deep concealment with a hipgrip and tyler T. The 36 is NO easier to hide with the same setup.
When the snub comes out for service, it's hot, clothes are minimal, it needs to be concealed and if it ever has to bark, I want the advantage [ any advantage no matter how small ] of the 357's ballistics over the 38's.
Brownie