I have a bunch of full-sized Witnesses and have had two of the SAR's (had to trade one though I didn't really want to).
As far as those two go, it's win/win. I like them both. I got my stainless SAR NIB for $249 plus whatever, if that matters. They are both well-made copies of the same pistol, so...
I don't know squat about that particular Taurus, sorry.