Join Date: Jan 2009
Location: Vulcan, Michigan
Don't have any experience with the Tristar, but as you say the two are very similar (in fact probably almost identical).
I had a Mossberg SA-20 and it worked just fine, and I have read a lot of good reviews on them. Personally I'm not planning on buying another Mossberg simply because I'm not happy with their customer service. I bought the youth model SA-20 (to get the shorter barrel) and figured I'd just buy an adult buttstock from Mossberg. WRONG - they wouldn't sell me one! So I ended up selling it for a loss to someone who wanted the youth model.
If I was doing it over again I'd buy the Weatherby SA-08 which is essentially the same, and I understand WEatherby will sell parts for it.
I had no complaints on the gun itself, it worked great.