I have a Cattleman and a Blackhawk next to each other.
Each is a well-made gun. The Uberti has aftermarket springs in it; for less than 20 bucks, they make shooting it feel GREAT instead of just good.
The Uberti is a reproduction of a gun that was designed in the 1840s. The 1873 Colt has the same moving parts as the earlier black powder revolvers -- an 1851 Navy has the same grip frame. The upper frame was taken from the Whitney designs of the 1850s.
The 1873 was produced using methods perfected during the Civil War.
The Blackhawk was designed 100 years later, and updated mechanically in the 1970s. It is produced using methods perfected during WW II. Internally, it's as modern as a Smith and Wesson 686.
The Vaquero and New Vaquero are Blackhawks that have been ground to the shape of an old Colt -- this is just their appearance, though. They're 20th Century revolvers, not 19th Century revolvers.
So, it's not exactly fair to ask which one is made better. I think they're very similar in quality.
Their designs are different, though. One still shares interchangeable parts with the first commercially successful revolvers. The other has parts that weren't designed until the 1970s.
Depends what you want.