I no longer own a .357 Sig or .40 but I have owned both in the past and other than cost and availability I prefer shooting .357 Sig. The conversion barrels normally work fine.
I got into .357 sig for the same reason Old School did back when Obama was elected the first time. All of the calibers were hard to find except for. 357 sig so I bought a stock glock 31 barrel for my glock 22 and started shooting .357 sig more than any other caliber pistol that I own. I liked it so much I bought a G33, G32 and a G31. The G33 is my carry pistol now.
replacement barrels work fine in G23, or 32, you can go back and forth depending on ammo avail. had a 9mm Stormlake that dragged a little on top right, filed on it, works fine. thats 3-guns in one. DONT mix up the clips/ !!
I had a glock 23 with a lone wolf, two port extended .357sig barrel for it. I loved it! The .357sig was a good bit louder due to the porting but much less muzzle flip. The .40 and .357sig mags are interchangeable, but I bought separate mags to avoid confusion. I would love to get a 27 or 33 to have the 3 caliber capability.