The question is like asking which is preferred, the hammer or the saw?
The Western style Single Action, namely the Ruger Blackhawk/Super Blackhawk, is my favorite for heavy loads for use in the field or woods. It is extremely accurate, powerful, and rugged. In addition to being such a fine performer, it is the most handsome of handguns, either blue and case hardened, or plated and engraved. No other handgun has such elegant looks. nor wears grips of ivory, stag, pearl, or exotic hardwoods as well.
But, for rapidity of fire, and speed and ease of reloading, then the double action revolver shines. It can be dressed up as well as the Single Action, though lacks the beauty of form possessed by the Single Action. There have been attempts to build DA guns as rugged as the SA, but these attempts have resulted in the awful monstrosities seen with rubber grips and scopes mounted.
Just my opinion.
Bob Wright
(Still my opinion.)