I actually felt the 6" was more balanced and more like the 1911 I am used to compared to the 3" or 4" models which to me felt "back" heavy.
You really answered your own question - but asking is entertaining and informative. Welcome to the forum, we are here to help!
As to dry firing it is common courtesy to ask first. Personally if someone dry fired a gun of mine without asking they would never fire a gun of mine again, dry or live.
When in a shop and "feeling" the trigger of a perspective revolver purchase I put my left thumb in between the hammer and frame so it doesn't slam down on the frame or firing pin. Unnecessary in most cases but just something I do.