Welcome to the Google Earth Community!

To answer your last question: all products (free, Plus, and Pro) use the same database. Meaning there is not more high-resolution with the Pro product. The Pro product has more tools (such as measure area and circles, and a movie maker) than the free product has.

Please read Understanding Google Earth Resolution Differences to learn about high-resolution imagery. Places in Africa where you can zoom-in to 70 feet is a very small amount of the data, and is provided by the National Geographic Society.

Let me know (privately, via a private message) if you have any questions!