Neither. Whoever gets injured first will lose...I think it's more interesting to compare the two:
In my opinion...
Love is a much better 3-point shooter and free throw shooter, and gets more rebounds (Might get a few more boards due to Darko not being a particularly great rebounder, though).
Griffin has a flashier game, with flashier dunks...but I think that he is similar to Love, although he is definitely stronger and more athletic that him. He is able to go to the basket and finish stronger than Love, and, given the choice, I would generally prefer to throw the basket to Blake on the post. Because Blake goes to the basket more, he averages about 2-3 more free throws than him. Also because he goes to the basket with so much strength, his Field Goal percentage is higher than Love's, at 52.0%, vs 46.7% for Love. Another important fact is that Griffin is a rookie, and that's big because he will most likely increase his numbers and skill set in the coming years.
Both awesome players, and both players any team would love on their squad. I would still slightly take Blake, but K Love is still the man.
Blake Griffin
22.0 Points
12.7 Rebounds
3.4 Assists
Kevin Love
21.5 Points
15.7 Rebounds
2.4 Assists