Unless you're wrong, and they're both superstars. I mean, since the trade, De'Aaron Fox has been the leader of the top scoring offense in the league, made the All-NBA team, led his team to the playoffs in the tougher conference, won the inaugural Clutch award, and is currently Top 5 in the league in scoring. In the same span of time, Tyrese Haliburton has done one of those things. I don't know why you've convinced yourself that one of them is still ascending, and the other has stalled out? And, if you don't think that, then I don't know why you think that only one of them is going to be a superstar?