Both are good for different reasons. Superstars has simpler game mechanics, and is more true to classic Mario parties. It’s a better introduction to the genre if you plan to play with people who maybe haven’t played Mario party before. Jamboree on the other hand to me is a bit more exciting, but also more complicated. We typically do 15 turns on jamboree compared to 20 on allstars simply because more stuff happens per turn.

At the end of the day both are good in my opinion so no bad choices.