Organic maps (and now comaps) have a much better rendering engine. It's much faster, while also being much more legible. It's routing engine is also faster.

OsmAnd does have the upper hand when it wcomes to features though. I have both and use OsmaAnd when I need to export a route to GPX or see relief.

I prefer the simple interface of organic maps

OM and for now CoMaps are faster and easier to learn. For most people. With OSMand configurations are endless and people tend to get lost in them. Also the map data of OM is highly filtered OSM data. Meaning smaller files and a faster app.

The downside is less features, but as always ... if you dont need the absent features ... its a plus.

Now whats interesting how they both will keep it that way. My theory is when they listen to EVERY wish from random users (with other persona and user stories) they eventually become like OSMand too.

For me its the android auto compatibility. OSM won't (and probably shouldnt) jump through the google hoops to do so. It's at least nice to have a more open option for an otherwise very proprietary ecosystem. Even though organic maps has room to improve

Organic maps has traffic, osmand doesn't. I feel osmand is better in pretty much every other situation but organic maps has traffic.