Yeah, the Weatherby is a bit more, probably because the finish is a bit better.
I wouldn't tell anyone else not to buy the SA-20 (or SA-28) - mine worked flawlessly. Just saying my experience with their customer service was enough for ME to purchase elsewhere - your results may vary!
From what I've read and heard this design (actually a copy of an older Beretta design) seems to work good no matter whose name is on it.
My late father in-law had a pretty bad experience with the last Mossberg he ever owned. To be honest, his gripes and complaints with Mossberg was enough to keep me away from them. I've never had bad luck out of my Remingtons, but for the price, the Tristar has my attention.