I like USB C for the simplicity of being able to plug in either way like Apples Lightning ports were. But I agree that it isn't particularly a game changer and I probably wouldn't make my decision on the USB plug alone. But I do hope that USB C is going to be a format that will be around a while to eliminate all the cords and connectors we have currently.
I am wanting to get a rear radar light combo though. I think in this case I would probably lean toward the Garmin because I have had issues with my Bontrager lights working as expected with my Garmin Edge. I don't know if that is Bontrager's fault or Garmin's because I also don't get a reliable connection between my Forerunner and my Edge when I broadcast my HR from the Forerunner.
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"It is the unknown around the corner that turns my wheels." -- Heinz Stücke