Apple Watch SE (2nd gen, 44mm) vs Apple Watch Ultra 3

The Apple Watch SE (2nd gen, 44mm) and Apple Watch Ultra 3 are most easily told apart by their overall size. On height, the Apple Watch Ultra 3 measures 49.0 mm against the Apple Watch SE (2nd gen, 44mm)'s 44.0 mm — about 5.0 mm more. On width, the Apple Watch Ultra 3 measures 44.0 mm against the Apple Watch SE (2nd gen, 44mm)'s 38.0 mm — about 6.0 mm more. On thickness, the Apple Watch Ultra 3 measures 14.4 mm against the Apple Watch SE (2nd gen, 44mm)'s 10.7 mm — about 3.7 mm more.

The Apple Watch Ultra 3 is the heavier of the two at 61.4 g, compared with 32.6 g for the Apple Watch SE (2nd gen, 44mm). That is a 28.799999999999997 g difference (88%). In daily handling the difference is easy to feel.