There is no question that Flagg is a (universally agreed upon) better prospect than Harper but I don't want to sell Dylan short: there is a small but decent chance that Harper will end up having a better career than Flagg. Taller/heavier basketball players have a much higher rate of career-altering injuries. Also, Harper has a more defined role to excel, while Flagg has a small but non-zero chance of repeating the trajectory of Aaron Gordon.What the Jazz need in order to build their team is an 'advantage creator' who can initiate with the ball. Both Cooper Flagg and Dylan Harper can do that.