It depends how much money the model was making and what the sport was. I'd pick athlete if it was a calendar model making chump change, but I'd pick model if there was money in that, and if the sport was something lame without glory that nobody cares about.
Model...it is less work and I am as lazy as an Elmo...5 stars
Are you asking me if I would rather have talent or look?
Both will go down hill with time but I rather do something with either one. I think I rather have look because in our shallow world, we are judge by our look first rather than our talent. However, like I said, it is what you do with it (be a movie star, singer, run a business, etc).