Hi joenad,
The
MGMAT CATs are generally regarded as being a bit tougher than the Official GMAT, but they are close-enough to the real thing that they will give you a reasonably accurate score assessment (assuming that you take the CAT in a realistic fashion). In addition, many GMATers spend 3 months (or more) of consistent study time before they hit their 'peak' scores, so the fact that your 2nd CAT (after just 1 month of study) was a similar result to your 1st CAT is not too surprising - it was likely too soon to see the types of gains that you have shown after 2 months of study. All things considered, assuming that you took this most recent CAT in a realistic fashion that matches-up with how you will take the Official GMAT, you are remarkably close to a 700+ right now.
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
1) What type of study routine have you been following? How many hours do you typically study each week?
2) What study materials have you used so far?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich