Going by posts and social media lately I'd say Hill was significantly more undroppable.
Itoje with a whole massive 2 meters gained from 3 carries? He missed 4 tackles (making 5) vs France. Let's be honest, if that were Ewels or similar he'd be getting rinsed. Itoje was a menace but England in need of shaking things up badly and getting experience for other players. Itoje is just not at his best right now and that's okay, there are others who can do just as well if not better at the moment. The reluctance to change, even temporary, is one of the classic downfalls of international English rugby. This isn't the world cup, embarrassing run of form including back to back defeats vs teams of 14 men...