The Spot is significantly different from the Zoombak in that you can send messages from the device to others - 911, family, etc. - at varying levels of need (emergency, help from family, or just checking in). None of the receivers would need to know that you were out on an adventure until the message was sent.

With the Zoombak, someone would need to know that you are out on your bike and would actively have to be looking for you and keeping an eye on your progress. It's more of a watchdog snoop from afar (maybe great for parents) while the Spot allows the rider to request help.

I can see where the two products might be seen as competition for each other, but they have very different uses and capabilities.