The fit is the same as the original, for better and worse. They're slightly too narrow, especially at the top, to fit my ears 100% comfortably, so I would love to see a version that provides a little more space than the stock ones.
Otherwise they seem to absorb less skin oil/sweat than the originals, which is a problem if you wear them all day, so that's a bonus. So far they haven't cracked like the original, but I've only used them for a few weeks, so we'll see as time goes on.