Props for having the chops to BACK UP the rebounding argument. Let me rephrase myself in I do not think Durant is in a separate realm from Melo. I believe he is better because of his more multi-faceted skill set (range, free throw shooting, flexibility as an offensive force with respect to iso).
And equal scorers more or less, yes. I agree. You can call either the greatest scorer in the world. KD's range and free throw accuracy give him the deadlier shooting to me, but you could counter that Melo's creative willpower in finding a way to get a shot off around the rim cancels this.
My only issue is ISO-MELO. It lurks and you don't know if it will strike again,
Winners are made in the playoffs, though. I'm not homo for KD. If Melo beasts n leads in the playoffs, and Durant can't (without Harden's late game prowess) I got no prob bumping up Melo right there in the top3 debate.