I think they are both obsolete on OS X and iOS, because there are programs that may do less but are simpler, more effective and cheaper.
Thanks for the quick response. My company already approved the purchase of Mindjet. Unfortunately, when David Allen, in the webcasts, tries to differentiate the uses for the two products, the relevant portion is removed, interrupted or otherwise not understandable. Therefore, I am trying to learn the difference, but other web sites contain useless information about old products. Moreover, both companies do not refer, for obvious reasons, to their competitor's products.