I have a couple Ruger revolvers (Redhawk, SP-101) and a couple Smiths. (625, 19)
The Smiths invariably have the better triggers, both DA and SA.
Rugers appear to be more stout, but actually aren't because they're cast instead of forged. This is also why they cost less.
If the Ruger you're looking at is polymer, keep in mind that plastic doesn't age as well as steel does. As it ages, the elastomers evaporate out and it becomes brittle, no matter HOW good the plastic is when new.
I DID used to have a S&W 29 in .44 Magnum, that used to shoot its screws loose when I shot magnum loads. I never had a Ruger do that, but I don't really enjoy shooting Magnums anyhow.