With the .38+P it’s easy for fast follow up shots. .357 is slower and I wouldn’t want to have to shoot it with a one handed grip in a fight.
Mostly the .357 just causes you to flinch I’m a Glock guy normally and do well with them but I can keep 98% of my shots with the 340 in a 6in group at 21ft with all ammo types. I need more practice with that trigger and I’m sure it will get better.