I compared the Navy and S&W guns side by side when I purchased my Revolvers. Externally the S&W was only slightly nicer than the Navy Arms revolver. The actions were about the same as far as lockup and tightness. The S&W had a much better trigger pull with no creep. The Navy's run at $700 versus $1300 for the S&W, there was not $600 more in the S&W (one of the reasons I feel S&W discontinued their Schofield line).
I never test fired the S&W. The Navys are excellent shooters out shooting my S&W 25-12 in 45 Colt and on a par with my 1955 Target. The two Navies I have shoot to their sights with the Lyman 250 gr 454190 over 8 gr of Unique. My one problem has been that the hammer spring on one of the Navys broke after 200 rounds. They sent me a new spring free of charge but I doubt the spring on any new S&W Schofield has ever broken. Navy Arms offers the Schofield in 38 spl 44-40WCF and 45 Colt in 7", 5" and 3.5" models, S&W only has the first two. One of the other shooters in my SASS club has a 44-40 Schofield and it too is an excellent shooter. These guns are much lighter than the Vaquero and (I feel) better balanced. However, I was schooled in traditional bullseye shooting and have over 30 years of experience with double action revolvers and can shoot the spurs of anyone in the club one handed with the Schofields but I am much slower in the speed shooting. One thing you may want to consider is that due to the Schofield's lockwork you can't slip-hammer them, you must let off the trigger for each shot. One real positive is in any stage that requires a pistol reload, the Schofields are hands down winners!
Hope this helps.