)"Advanced GMAT Quant is an amazing book", is what my friends say. I never used it, but my friends who used it say that it is the reason for their Q50's and Q51's. Let's cut to the chase, Here is Dana's analysis of the Manhattan GMAT Advanced GMAT Quant Strategy Supplement.
https://www.beatthegmat.com/mba/2011/06/ ... supplement
p.s: I don't think there is a great difference between the 3rd(?) and 4th. Let me know if you need any further help
