Okay... Lets entertain this then...
Melo averaged over 8 RPG 2 years ago, and he was strictly starting at the PF position. Where he also played the most minutes of his NBA career of 38.7. Since you want to use Melo's best year rebounding, then lets use Love's 2010-2011, where he averaged 15.2 RPG. That is almost twice as much, in 2 fewer minutes.
Melo has also averaged 34.2% on 3P, whereas Love has averaged 36% with .5 more 3PA.
Melo has more points and assists, but he's also coming off a serious knee injury at an age where regression is due to happen. Love is reaching his prime coming off a dislocated shoulder that was indirectly caused by a player.
I didn't mean to come off as a jerk KG Living Legend, but... Sure small ball is becoming more and more popular, (by the way I still think Love is 6'7-6'8 and not 6'10,) but Love is a great rebounder, perfect on outlet passes on the fast break, and can shoot the 3 better. I just don't think the Cavs would ever do this. It just doesn't make sense, especially since Melo is getting paid more, and is a type of guy who wants to MARKET himself. Cleveland isn't not marketable.
Yes I would take Melo over Love this year, but I'm not too sure anymore. Both are injury prone, but one is due for a regression, while the other has many concerns with staying healthy, but will have plenty of years to dissuade that.