The main difference is the millionaire next door talks about a very conservative approach that some people use to achieve a pretty high net worth. Ie living below ones means, owning a business, owning there house outright ect. It is certainly worth a read.

RK's methods are a bit different. He talks about things like passive income, expanding ones means, and having your money work for you. RK is big into RE investing and not really strong in paper assets. The forums seem to reflect this, if you like RE they are great. He is now working with Trump, they have a similer style.

I find the subject fascinating and love studying RE and various methods to make money, hold, sell, and leverage it.

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