I have noticed that organic maps gives a bit to much weight to cycleways during navigation for bicycles. See the example below:

Graphhopper location

The route by organic maps results in an additional 500m where logically, I would use the route by graphhopper this time. It is more direct where in my opinion the shorter route outweights the additional 500m that is over cycleways.

I have to note though that this preference for cycleways in general results in better routes then graphhopper. In the example below, organic maps routes me over cycleways near major routes where graphbopper gives me a route through the residential area. Using the cycleways gives a much nicer bicycle experience and almost no additional time.