Since we're getting into the names of the plants, some details here...
Aloe vera has different medicinal properties from Aloe ferox, also different from Aloe officinalis (or if you prefer Aloe vera chinensis). The different plants are cultivated for different uses, and different parts of them are used. It may be the gel (Aloe vera) or the juice (Aloe ferox) or something else. And Cape Aloe refers to Aloe ferox specifically, I think because of the Cape of Good Hope. Not that it's actually specific to the Cape any more than other aloes. Maybe that's just a very effective marketing term, I don't know.
