Hi All, I am new to this forum, so I apologize if this is not the right place for my following question.
I have searched the previous posted questions in this forum and found out that people think Kaplan's CATs are harders and they usually get lower scores on Kaplan's CATs comparing to the the scores they get from GmatPrep & actual Gmat.
My Kaplan CAT scores are: 520 (no study), 540 (2nd week), 600, & 670
However, I just took my first GmatPrep and scored only 580.

I understand from this forum that GmatPrep gives the best and closest estimation on my actual Gmat score, but how come I was able to score higher on Kaplan's CATs while most other people here scored higher on GmatPrep?
Can anyone please give me a few advices?
Thanks a lot!!