Good first gun, Model 19 .38/.357 in blue with a 4" barrel:
Great gun, but horrible first handgun - Model 29 in nickel with a 6" barrel:
The difference in size is tremendous. It doesn't really show as much as it should in photos, by M29's are huge revolvers:
I have to say that, because of its size and the size and shape of its grip, the M29 is far from my favorite platform for the .44 mag. While it is larger than other revolvers chambered in .44 mag, it's also not as strong. Continued use with heaver loads will eventually damage them. Granted, not an issue for many shooters, but I haven old Virginian Dragoon with well in excess of 10,000 full power rounds through it that is as tight and accurate as the day I bought it.
Various .44 mags:
The single actions are much easier to shoot, and punish less, with heavy loads. The M29 is what gave the .44 mag its (somewhat undeserved) reputation for nasty recoil. It's much better in single actions.