This is generally correct, but if you want to get technical, cacao powder is less processed and healthier than cocoa powder, which may have traces of cocoa butter to enhance the flavour.
"Cacao" is a bean that comes from a tree & " Cocoa " is a powder made from seeds.
Cacao is the plant we get cocoa from... i think
You guys!!! Cacao is Cocoa in Spanish :D