Similar. Not exact (to me) but very similar.
Very similar, however they aren’t weighed down by the cables - which doesn’t sound like it would make a difference, but it really does.
With the bundled earphones I only have to think about them falling out and they both ping out of my cavernous ears. If I turn my head the cable gets pulled and out they come.
My AirPods, however, stay in even while running or when I’m crawling about at work.