I know you don't like my mentioning Davis Bertans, but if we're being honest, they have some of the same strengths and weaknesses. They both are good at running the floor, shooting spot-up 3s, hitting floaters from 8-10 feet. They have some of the same physical limitations defensively and on the boards. Tillie is a better paint scorer and can finish with either hand around the rim, and he's a better and more creative passer, but it remains to be seen if he can do that against NBA bigs. Bertans has shown more shooting range.
I like Tillie and think he should be better than Jerebko, but I think we should be aiming higher for a starting 4. Id just temper expectations a bit.