I have a Glock 23/27 and 31C. I have conversion barrels for the G23 to 9mm and the G27 in 357 Sig. I can use the 9mm bbl in the G27. They run flawlessly.
My EDC is my G27 with the 357 Sig bbl and the G31. The 357 Sig blows the 9mm (of any pressure) out of the water. 9mm is cheap for practice, but does require 9mm mags. Glocks chambered in 40 and 357 Sig are identical except the barrel.
My plans are to have all 3 Glocks convertible into 9mm, 40 and 357 Sig.
My rifle and pistol are tools, I am the weapon.