Moto cross – riding round a track usually 2 or 3 miles elbow to elbow racing, big jumps etc
enduro – thinking man’s off road riding. 3 hrs to 6 days plus, racing against the clock with penalties for going through time checks late (or early) (60 points per minute)with balls out secial tests thrown in. Total points = special test time in secs plus penalty points, one with least points wins
courses are longer (usually 6 mile multi lap up to 150 mile big loop (eg Welsh 2 day enduro) and are natural rather than man made tracks – logs, rocks, streams, mud, big climbs etc. Oh and it is knucking fackering after 3 or 4 hours or so
bikes will be similar to motocross bikes but less fierce power delivery, softer suspension, and usually road legal with lights etc as some events will use a bit of road
google “David Knight” and prepare to have your mind blown