In the accuracy department, it's a wash. In the fit and finish department, it's easily the Uberti (one piece walnut grips, nicer bluing, nicer case hardening and much better triggers). In the durability and overall ease of use, it's the Ruger hands down.
If you want that Colt's experience, then you go with the Uberti; but understand, the Colt SAA is a somewhat fragile design. Shoot it a lot, and you'll be replacing parts (but they're very easy to change).
If you want most of the Colt's experience, but don't want to ever have to turn a screw on the gun, then it's the Ruger.
I always had a preference for the Uberti, but I have managed to essentially wear one out after 15 years. I would still buy another one; they're very good revolvers for a very good price.
If I ever found myself competing in Cowboy Action again, I would choose the Ruger in a New York Minute!
