A route tagged enduro-only means a GS will have a bad time. A route tagged easy means a fully loaded Multistrada can enjoy it. The tags are the point of the catalog.
Big ADV here means a large adventure bike. In the Sarajevo pack that is Ozren via Čavljak, the Misoča canyon, and the TET toward Lukomir. Ozren is gravel with a way back. Misoča is tagged for a big ADV and still has exposed drop-offs and a narrow railway section.
Mid-size and enduro pick up the short hill rides. Motka Peak's note is that deep mud and ruts can trap a heavier adventure bike, and some lines are closer to enduro than to a typical ADV trail.
Published routes tagged for a large adventure bike. Many are also fine on a mid-size bike.
Published routes tagged for a lightweight enduro. Read the warning before you take a heavy bike.