If I can add something else, without distracting from the original thread question ...
I really find the 642-1 to be the best balance of size & weight for my concealment needs. I no longer carry a secondary, but when I did it was an older 649. Nowadays it would be the 642-1.
I dislike the ammunition restrictions (no lead) of the Ti & Scandium/Ti snubs ... Losing that 3+ ounces of weight, to go from the aluminum/stainless steel gun to one with a titanium cylinder, just seems to create some ammunition concerns when it comes to bullets jumping their crimps.
Also, although I fired one of the newer titanium/ported Taurus snubs recently, I still don't care for them. The owner told one of the other range staff that he'd experienced some bullet jump issues, with some jacketed ammunition, if I remember right ... That's not a good thing. Maybe after the ammunition manufacturers have developed jacket and lead ammunition that takes the ultra lightweight snubs into account ...
I don't mean to step on anybody's toes ... but in the meantime, while I personally consider the Taurus guns to be better than Charter Arms and Rossi, I don't consider them to be in the same class as S&W, Ruger & Colt ... yet ...
If I had to carry a short barreled revolver as a belt gun, it'd probably be a S&W 66 or 65 ...