I'm not familiar with "Otis" so it may be the same thing. Boresnakes are great. While a bit more trouble, you can take it apart and clean from the breach.
Honestly on the SAA question, who will give you the best deal, and what do you want to spend. Colt and USFA are high dollar items, even the USFA low end is pretty expensive. AWA and the high end imports are close to the same price. Cabelas Mellinium is made by Uberti, same as other imports, can be about the same gun without the fit and finish of the norm. Good value. Can be slicked just like the rest. If you want you can remove the finish and have a gun that looks a hundred years old.