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.