Funny... I prefer the first one because of the look in her eyes, boob size is irrelevant to me as long as they look nice (they do on her). Her expression and tightly gathered hair in the second are a turn-off for me.
Also, the second one seems to be mirrored and run through some filter, by now Google Image search is full of original-quality versions of that too. Apparently the cease-and-desist orders to take down the images sent to tabloid websites were not so effective after all, or did not reach the entire Internet...