Hi Anurag,
Since both of those dates are after the release of the "new" GMAT (with IR instead of the 2nd essay), the 2 practice CATs (and the pools of questions that come with the Quant and Verbal sections) are likely the same. There might be some differences in the practice questions and IR sections, but since those dates are relatively "close" to one another, I would suspect that most (if not all) of the resources are the same).
GMAT assassins aren't born, they're made,
Rich