Well hank, they were both taken with the same camera, so I would believe that yes, they are the same. According to the embeded information on the picture, they were both taken with a sony ericsson K-750i and the same settings on each picture. The first set was apparently taken on 9/15/2005 around 11:30, and the second set on 3/18, 2006 at around 5:30. Both cameras are even using the same version of firmware on the hardware itself, so unless there is a BIG co-incidence going on, I am positive that they belong to the same person. You are far too suspicious 😛
EDIT: Oh, yea, Nice girl by the way. Real cutie you got yourself! 😀