Not that I want to defend any kind of selfhelp book but when it comes to loosing weight you are wrong.
Those two are by no metrics the same.
One of them gives you step by step advice (eat this apple, eat this brocoli don't eat fat) things you can act directly on and that can be measured the direct effect of.
If you follow the advice in most of these books you will loose weight.
There is no external factors involved.
With RDPD the external factors are extreme. Actually following the advice of the book wont make you rich.
Those two are by no metrics the same.
One of them gives you step by step advice (eat this apple, eat this brocoli don't eat fat) things you can act directly on and that can be measured the direct effect of.
If you follow the advice in most of these books you will loose weight.
There is no external factors involved.
With RDPD the external factors are extreme. Actually following the advice of the book wont make you rich.
Following a diet will make you slimmer.