I think DS3 is great in its own way and has some awesome areas, but it's hard to compare anything to the first half of Dark Souls. That level design is just something else.

What I like about DS3 compared to ER is there are a lot less delayed attacks and fakeouts. I get that FromSoft needs to constantly up the challenge but it makes it harder to get the same kind of enjoyable combat flow, at least for me. DS3 has some bosses that are just so enjoyable, even though they're not super hard.

Oh and, don't know if you've done them yet but the DLCs should be more challenging than the main game, if that's what you're after.