Differences between 5th Edition D&D and Pathfinder?

4th Edition took D&D on a very different path from 3.5, and Pathfinder (often referred to by players as 3.75) filled the niche of the continued evolution of the 3.x system.

I enjoy Pathfinder quite a bit (at least at low and mid levels; I’m just now trying some high level play and hoping to make it work as well, though it seems less wieldy). Now 5e has been out for some time. I haven’t looked at it yet but I’ve heard positive comments, including that in many ways it’s a return to D&D’s roots.

Can you explain to a Pathfinder enthusiast what some core differences are between PF and 5e, and why one might choose one over the other?