Along with the "Pro" moniker comes a whole bunch of extra features:

Active noise cancellation, Transparency mode

Inward-facing microphone for the adaptive equalizer

Custom-designed Apple H1 wireless chip with Bluetooth 5

IPX4 water resistance

The charging case also got notably chunkier at 1.61 oz (45.6 g).

Not that more heft is necessarily a bad thing at all—our latest iPhone teardowns showed some mildly bulked-up devices with huge corresponding increases in battery life.