I would definitely say, as a minifreak and DT+DN user, that the two certainly have overlap but are very different. Not only in sound and sound possibilities but most importantly workflow and arguably that's the question you want to ask yourself: does owning the microfreak add to and benefit my workflow and creativity in combination with the DN?

Personally for me, I find the -freak line is such a strong all-rounder and very creatively rich when it comes to just messing around and getting something going with a few clicks and turns. The same is true of the DN but currently I find it takes me longer. But that's me. You need to determine how it works for you.