This is a good question. I think it depends on who they are coached by. Painter has a long and proven track record of developing his players, and getting the most out of them. Archie is still unproven at the BIG level. He did well (win/loss) at the previous school, but I can't identify any situations where he developed someone. I'm not knocking him, I just don't know.
When I look at IU's roster plus recruits, I see a hell of a lot of medium sized forwards. I don't know how all those guys are going to fit together. There are only 5 guys on the court at an time. This is a big recruiting year for IU, so my analysis must consider a whole bunch of kids that have no college experience and whose games may or may not translate to the college game.
Right now I see Sasha, Haarms, Nojel, Boudreau and Tre next year, with Hunter, Wheeler and Dow coming off the bench. Add in Newman, who I think will be an impact player from day 1. That is a good team. For IU, I don't know if Romeo will return next year. I know Morgan is gone too. That makes IU very young up front. I do admit to having a blind spot regarding much of IU's current team, so what I offer is an indefensible opinion. To me, with my knowledge bias, Purdue will have the better 2019-2020 team because of experience and skill. Sasha and Nojel together will make the team very strong.