[For now] I'll defer to you guys with more experience with these short .22's. But the gain in velocity between 2 and 4 inches isn't as slight if the difference was between 16 and 18 inches!
At 2 inches (or 1 7/8), with that length the Long Rifle (or other RF) is extremely inefficient! Most of the powder is burned before the bullet leaves the chamber, altho gas expansion and acceleration is dramatic darned important until going at least 4-6 inches, according to what some gun labs and supressor mnfcrs have written!
Not saying the snubbies don't fulfill their roles.
Woodduck's point however, about barrel lengths reflecting their purposes with these rimfires is VERY GOOD!
But just for everyone's ingo, I met a fellow who thought it would be great (with his buddy), for the both of them to buy North American Arms .22WMR's with the 1inch barrel.
After embarrassing himself in front of a bunch of ladies he instructed in a HG class, when he tried to hit a one gallon milk jug (of water), he continued to miss until his 4th or 5th shot at about 3 feet! Bullet finally punched a hole into the jug and was found after the water mostly leanked out!
Says that little piece now just occupies a spot in his safe.
Learned this [anecdote] when looking for info about the
4inch Mini-Master version of that mini-revolver,
to use as an ultralight kitgun / survival piece.
[For now] said I'd defer to you more experienced guys since I don't yet have my Mini-Master.
Also remeber when its easy to find 2inch M34's back in the 80's. Good solidly made S&W revolvers! But never thought they were good for much.
Nowadays with a Stinger or Velocitor could definitely screw up a THUG's day! But they are still kinda smallish!