Threading is a bit more compact in Iris, which I like, and there are some UI changes that are appealing, or at least different. Other than that, though, Damus is smoother in just about every way. It loads faster, zaps are working, profile editor is cleaner, DMs are separated, and a bunch more. It’ll be a while before another iOS app can catch up to the polish that #[3] has given to Damus.