There are two variants of the Nomad Base Station. Hub Edition and Apple Watch Edition.

The difference between the Hub Edition and the Apple Watch Edition is the former includes a 7.5W USB-A port and an 18W USB-C PD port to charge an additional two devices, while the later, only consists of an Apple Watch charger.

Nomad Base Station Apple Watch Edition - Box Front
Nomad Base Station Apple Watch Edition – Box Front