To go further into it further, Enduro is actually the race setup, where there are Special Stages (predominantly downhill but not necessarily), which are timed, these are connected by liaison stages, which are not (though depending the race/organisers, each special stage may have a cutoff start time or a dedicated time the each competitor needs to start). AM bikes tend to lend themselves to this sort of format, but there's nothing stopping anyone setting an XCO style Enduro. The only thing the Enduro "might" share with Endurance races is the liaison, though one can get pretty tired giving it a good tonkl on the Special Stages, was starting to cramp in my left calf on Sunday towards the end.
