80k hike vs 50k run

Hi all,

I am from the Netherlands and last year I completed the Kennedy march which is an 80k hike. The hike is flat but the tricky part is that it starts at 20:00 so you hike through the night. I finished in just under 16 hours. I was wondering how this would compare to lets say a 50k run in terms of toughness.

Does anyone have any experience in long distance hiking and ultra running?

Thanks!