Just based on attractiveness TO ME, I would go with the half dollar. I like that color on circulated silver. The Trade dollar is rather splotchy for my tastes.
I'm a seller, and if I was buying one for resale I'd buy the trade dollar at 125. Those are great collector prices for both coins, however. But I think I could make a little more $ selling the trade dollar.
Trade dollars are heavily counterfeited so a higher grade, genuine specimen is a nice pickup (imo). Presumably it didn't grade due to the chopmarks. Chopmarks are a part of the history of the trade dollar and add character to the coin...but that's just my opinion...others may consider it "damaged goods".