I also strongly believe two identical revolvers, except from the barrel lengths, are, if equally made, inherently, equally accurate guns.
The fact is a shorter tube means a shorter radius, then, a somewhat more difficult gun to shoot accurately with.
Plus, a shorter tube also often means less weight, and somewhat more recoil. Another difficulty to shoot accurately.
My almost daily shot revolver is my 4", .22 Lr mod 18.
This relatively short barreled revolver is, I believe, the pinnacle of training, learning revolver.
Each and every time I feel, and see on the targets, I'am getting bad habits with larger bored revolver, I get bak to the small K frame.
This way, it is very easy for me to find out where is the trouble, solve the problem, and then get back to larger bored revolvers...
This, despite the relatively short tube of the venerable rimfire six guns...
Then...Shall we conclude a shorter barreled revolver is ALWAYS
a more difficult gun to shoot accurately....? Maybe not....