I think that no any prep-books are similar to actual GMAT test, except old paper-test GMAT, such as official guide or GMAT Plus.
However, I think cracking math of GMAT should focus on advanced questions; but, I have not seen this questions on any workbook in market.
I think that a average question can be solved easily without more work on math, yet an advanced question often can be missed in actual test.
So, I think we shall need great quality questions instead of quant questions.