I have used both and still have them both but as long as the delorme keeps working, the Spot will never see the light of day again.

Delorme is two way even with emergency alarm and you can send emails and texts to anyone in the world. Run it on continuous tracking and team it up with Spotwalla and selected people back home can see where you are every 10 minutes if you choose. Send an I'm camping here message to selected people every day and you are always in touch and don't have to worry about them being worried.
Spot does much the same things but it is basically shouting into the sky with no indication that anyone has heard you. With Delorme, you can know it was received. Spot is also much less reliable in high latitudes whereas Delorme seems to work anywhere as it uses a different satellite arrangement.

They both offer an addon rescue insurance policy - 20 dollars a year which might help you get action in countries that don't have full free rescue services.

The SOS on both units triggers a response in a situation room in the USA i think and they coordinate with specific country search and rescue. Spot response will be bells and whistles, while with delorme you can get a tailored response according to your situation and of course you can communicate with any phone or email whereas the spot can only send preset messages to a couple of selected people.

__________________
Tony
Click here for Travel Photos & Travel Map