If I were planning a trip like that, I would go with the simplest and most robust drivetrain with the easiest-to-find/replace parts and a proven track record (Shimano).

There's absolutely no way I'd trust something as complex and delicate as a 14 speed hub to get me around the world - or anywhere else that was farther than walking distance from home, for that matter.

Best of luck with your choice and your trip!

Regards,

John