I'd love to revisit this question now. In a redraft of the 2016 Draft I would take Brown over Ingram in a heartbeat. And depending on your view of a 6'10" point guard who can't shoot outside of nine feet, I might also consider taking Brown #1.
Simmons is an elite talent, but in the playoffs you can't win a championship if you can't shoot a jumper. Not unless everyone else around you is a world-beater (see: Rondo, Rajon). And even Rondo could actually hit some outside shots.