After writing yesterday about the differences between PersonalBrain and Mindmappers, I started thinking more about what the core difference between them are.

• Is it a temporal difference? Mindmaps tend to expire whereas information in PersonalBrain tends to be valid over a longer period of time.
• Is it a difference in the amount of data you can to see at once? Mindmaps allow you to see possibly hundreds of nodes at once where realistically in PersonalBrain you can only deal with maybe 10 or 20 on the screen at a time.
• Is it a difference in the way you can connect the information? PersonalBrain is more organic and mindmaps are structured.

While these are all valid points, they don’t get at the heart of it which seems to be:

In PersonalBrain each node is first class data, whereas in a Mindmap, nodes have hierarchal importance. This means that in PersonalBrain any element in the “plex” can have infinitely detailed information associated with it. You can extend any node with unlimited sub-nodes that provide additional detail without consciously structuring the data to allow for specialization.

For example, I’ve created a Mindmap of my notes for the book Linked and one of the nodes in the map is “Power Laws”. The more I research power laws and get into the details, the more nodes I’ll need to add. Eventually, one of two things will happen - either the mindmap will become cluttered and unwieldy or I’ll have to start a new mindmap. If I do the latter, I’ll then have to remember it exists and open separately if I go back to my book notes. Neither is desirable.

In PersonalBrain if I have a power laws node I’ll never run out of space under it and everything associated with that node can be associated with any other node in the system.

On the other hand, it’s sometimes beneficial to have the concept of a leaf node and the structure a mindmap offers. In PersonalBrain it’s difficult to emphasize the importance of a node since there really isn’t the concept of the “center node” that a mindmap has.

So, the conclusion remains the same–different tools for different purposes.