Comaps and organic maps are very similar (they forked very recently). The only difference I can think of from the top of my mind is that organic maps is not fully open source (map files and generator are proprietary) and has some kayak sponsored suggestions/reviews
> organic maps is not fully open source
Organic Maps is a for-profit venture that accepts donations. That's sketchy. Management also seems to have prior Kremlin links. Which is sketchy.