Full disclosure I'm Australian - I don't really follow teams, more so Aussie players - so have been watching Utah games since Exum was drafted and have been devastated with his injuries over the past 4 seasons, this season I've watched tons of games from both 76ers and Jazz.
Both DM and Simmons are awesome players. Hard to compare due to different positions, body type, game styles, team methodology etc.
One interesting thing is the comparison of the conferences people bring up, it's not a debate that the East is weaker and has been for some time. An interesting stat I looked at was 76ers record vs West compared with Utah vs East, surprised me.
76ers vs West = 18-12 60%
Jazz vs East = 14-16 46%
both teams had identical records against own conference opponents 34-18 65%.
both players awesome, both teams have overachieved, go basketball.