GMAT Conundrum - MGMAT Score

Hello everyone,

Long time lurker on these forums and first time poster here. As a little bit of background, I'm a recent university graduate who comes from a very quantitative focussed background. Native English speaker. I've been studying for the GMAT adound one month now and I've just recently entered into the phase of doing actual practice tests. I purchased the MGMAT set of six practice tests, as I heard they were a relatively good representation of your actual score.

I just completed my first two tests and I received 640 and 590, respectively. Entirely disappointed at this result since my goal is 750 or higher given my demographic and the school I wish to apply to. However, when I took the first GMATPrep test I received a score of 730. At some further background:

Quant
I purchased the GMATClub question set (godsend) and regularly get about 28 to 30 out of the 37 questions correct on the quant CATs.

Verbal
While I don't have a specific resource from this aside from the official guide, when I sit down to do verbal I generally pick about 41 verbal questions spread over the latter portions of each question set in the guide. Typically, I only get one or two wrong (3 is a very bad day). I understand these questions are not at the highest level of difficulty, but if these questions are around 600, then it should be the case that I'm getting the majority of the medium difficulty questions correct, but apparently MGMAT disagrees with me.

When I reviewed the MGMAT test, there was nothing specific that I was lacking knowledge on. As a matter fact I just found many of their verbal questions to be very different from the style of the official guide ones. My real question here is should I be concerned? I'm just not sure why the discrepancy is so large. Should I disregard the MGMAT tests for now on and just stick with GMATPrep?

As a sidenote, test taking anxiety really isn't a problem for me. And timing hasn't been an issue either. I'm a recent graduate, so I'm used to being in an environment that's heavy on test taking, and I actually tend to thrive in those environments.

Perhaps one more note, I have the next three months where I plan on starting full-time, about 14 hours a day (8 min). Any guidance would be appreciated.

**I in no way mean this post to be a criticism of the Manhattan prep tests. I'm sure they work very well for some people.