ClustrMaps and Google Analytics regional data

ClustrMaps and Google Analytics aren't returning the same data. For example:

• According to Google Analytics, I haven't visitors from Atlantic or Pacific Islands. ClustrMaps reports those.
• According to ClustrMaps, I have no hits from Angola. Google Analytics reports them.

This is a great advantage I have over the great technobloggers: they would never notice a one hit visitors difference :) Good for you, devcatharsis :)