Depends on how we're acquiring the player -- Melo can come as a free agent if he exercises his ETO. Love isn't/won't be a free agent so we'd have to acquire him in a trade. Either guy would be an upgrade (obviously), but if Mirotic ends up coming over here, bringing over Love would be pointless if you'll end up asking Mirotic to do similar things. Gibson has proven he should have expanded minutes. Anthony makes more sense to the current roster construction, especially if Rose comes back. The only problem is having two ball-dominant offensive guys that operate mostly out of isolation. With Noah's ascension as an elite passer, I'd be interested to see how the offense could evolve with more of an inside-out game.
So, in the end -- Melo, if we're strictly speaking acquiring a guy this offseason. The asking price for Love would be outrageous.