Aldridge by a country mile, because:
1. He's a bit taller (6'11" vs barely 6'10")
2. He's a lot longer (7'5" wingspan vs 7'0" wingspan)
3. He's a lot more mobile / agile
4. He's a more capable defender and rim protector due to his size/length
5. He's a more capable P&R defender due to his improved mobility
6. He's a more dangerous 1-on-1 scorer, as his length allows him to shoot over defenders
7. He's less injury prone
8. He's a better locker room guy (Love by now is known to be a diva, a bad leader, a quitter)
9. He's a more versatile scorer (happy to score inside, outside, or off the dribble)
10. He can play PF and spend some time at C (Love can only play PF)
11. He's shown he can carry a team to the playoffs multiple times as it's #1 option - Love needed to ride Lebron/Irving to get there.
What does Love offer over Aldridge right now aside from being 3 years younger (which given his injury/health risk, is a moot point) and being a slightly better rebounder? Nothing at all, really.
No he's not.
From where did you hear this?
1: Proof of not being a LeaderRicky Rubio (Love's own teammate) stated publicly (WHILE he was Love's teammate) that Love isn't a "leader" type. To paraphrase Rubio, he said he's a great player and all the rest, but he just doesn't have the personality of a leader. That's fine because not everybody has that in them, but if you are paying somebody the type of money people WANT to pay Love, and giving a guy the type of role that people WANT to give Love, then you want the guy to do more than just score and rebound. You want him to earn the respect of his teammates, and to lead your team both on the court and in the locker room.
2: Proof of being a quitterLove forced his way out of Minnesota. The Timberwolves management made it very clear that they did not want to trade Love and would do everything they could to keep him. He requested a trade and forced their hand with his justification being that he was sick of losing and not making he playoffs. When Carmelo took a similar route, everybody bagged him out and labelled him a quitter and a diva - but Love does it and somehow that's OK?
3: Proof of being a DivaWhen Love got hurt by Olynyk on a pretty common basketball play, he publicly announced his thoughts that Olynyk INTENTIONALLY hurt him. Then after Olynyk tried to reach out to him to apologies (a clear sign of regret that things went as they did) Love refused to answer his calls or return his messages for weeks. That's about as Diva as it gets. Olynyk is trying to show respect by being a man and apologising/owning for his actions, and Love responds as you'd expect a teenage school girl to - by crossing his arms and saying "hmph...no...I'm not talking to you!!". The fact that it took something like a month for Love get over this and contact Olynyk says all there is to say.
4. Proof of being a bad teammateWithin about a month of starting the season with Clevleand, Love publicly commented about how hard/frustrating it is playing with Lebron. He spoke of Lebron needing to have everything done his way, and that everybody else on the team needs to just accept reduced roles, whether they like it or not. He talked about how frustrating it is not being allowed to play in the post more (not like he did his last year in Minny anyway) and that Lebron's presence forces him to play on the perimeter more, and that the team wasn't using him in the most effective way.
While nothing directly insulted Lebron, the whole article was written in such a way that it made it sound like Lebron was some big Diva and playing with him was some giant burden. The comments had enough of a negative tone to them that Lebron himself (the biggest Diva of them all) had to remind him to be careful what he says to the media.
Of course this all happened when Clevleand were losing games and under-performing. Once they started winning he stopped whinging. Typical Kevin Love - when you start losing, just whinge and complain and throw the blame at others.
How many sacrifices did Kevin Garnett and Ray Allen make to their games when they joined Pierce in Boston? Not one of those guys complained, they embraced it. They all said "we'll sacrifice whatever we need to individually for the greater good of the team".
Chris Bosh made similar complains about Lebron too, but at least he did so AFTER Lebron left and was no longer his teammate. To say things like this about a guy you play with every day (and a leader of your team, no less) is just being a bad teammate.
Lets just say that Kevin Love is not exactly the model professional.