The big difference, is FOAM notes are meant to be flat (or you can use folder I guess) and you explore just via the links whereas Dendrons have hierarchies of n

The big difference, is FOAM notes are meant to be flat (or you can use folder I guess) and you explore just via the links whereas Dendrons have hierarchies of notes. So "food" is a note about food in general, "food.chinese" is a note under food that's about chineses food, "food.chinese.tao-chicken" is a note about tao-chicken under chinese-food, etc. You can also just skip notes in the hierarchy, so you could have just "food" and "food.chinese.tao-chicken" and a placeholder "food.chinese" would appear in the graph. I personally really liked the note/subnote model used in Zim Wiki, but that program wasn't great for code snippets or to write graphs so I'm pretty excited about Dendron. In comparison, trying to connect my notes is just such a pain with a flat system like foam and Obsidian.