Topo active vs cycling maps.

On my European fenix 5x I can choose between topo active and bicycle maps.
Both fairly large and leave no space for different maps.

What's the main difference between both maps?
I can't choose what maps I want to keep.
For all I know is that the topo active can be used for biking also and the cycle map can be used for hiking.

Are they both osm?
So maybe I need an real topo map?