I do like the idea of USB-C, the garmin's power plug is nothing but annoying. It's really just a matter of battery life and what sort of software integration it has. Although, it's hard to beat the Garmin ecosystem.
But a watch, something people will wear swimming, sweaty, in the rain, etc, is something that should ideally follow the wireless charging standards, and not have a plug taking up space, and being a spot for leaks...