I would think that life is more beautiful.
I feel that this whole argument is less... sensory than it should be. Art is, almost by definition, focusing on a portion of our senses. You have painting, an art form that focuses on visual aesthetic; music, which focuses on our hearing; sculpture, which takes both the visual and the touch senses into account. The final product is intended to take those specific senses and heighten them to a point that is nearly impossible to reach in our actual lives. Humourously, you could conceivably argue that art is really just a bunch of drugs.
Of course, anything that hits all 5 of those stages isn't really art anymore, it becomes a part of life.
This is art. (Heh, I feel like I'm quoting Portal 2.) It is a photograph of an avenue I live near in Brooklyn, Emmons Ave, at night. It's an alright photograph, too, nothing too fancy, but it conveys its message well.
But does looking at a screenshot of Emmons Ave at night do Emmons Ave justice? I sometimes go out at night to Emmons just because I feel like it. I don't bring my camera either, because I know that absolutely no photograph will suffice to capture what makes Emmons Ave, Emmons Ave. You can't take a picture, or draw a painting, to express the smell, for instance, or the variety of people to meet. You can't simulate the feeling of neon lights from seafood restaurants meeting the pitch blackness of the marina. You can exaggerate it, maybe, but you still can't put the feeling in the person. Maybe a piece of literature could, but I doubt it. No matter what, you can't have the breeze on your shoulders to provide you with its beauty.
So I'd have to say life. By definition, it's a better experience of beauty, that extends far beyond aesthetics.