Its hard to tell but are those boobs gravity defying or has some work been done there?
Not that I am complaining but those clearly look like bolt-ons... and, she was much prettier in the first picture... shows the value of a good photograph.
I think that Miss Upton is regarded more highly because she appears to be natural - physically and in the way she acts - and seems like a goofy, good-natured girl-next-door with some actual personality - at least in the few videos I have seen of her. Her assets in the chestical region are obvious. Otherwise, she is built a little strangely - with no real waist to speak of... Again, not that I am complaining.