I've posted this before, but it's relevant to this thread:
A long time ago, a friend and I did an informal side by side by side "test" for accuracy between S&W, Taurus, and Rossi .38 spl snubs.
We used Federal Match .38 spl wadcutters all from the same lot.
We shot five 5-shot groups, from sandbags (no Ransome rest available), at two different yardages (have to check ranges, I think it was 5 & 15 yds) from each revolver (50 rounds per gun, total).
We cleaned each before starting and at yardage change.
Still have the data on groupings and target data, just have to "find" it in my piles of files in my shop.
I do remember the order of finish was (it was close):
1st Taurus
2nd Rossi
3rd S&W