Trying to select the appropriate sphere was like a roller coaster ride, because I always doubt that Mikey will show us a much more magical way of doing something.
Designers are looking for loops. Which makes it easy to add more details. But basically, when doing it the right way. There is no difference in how you started the build a sphere. Only what the intention will be, to start with a specific sphere. Don’t worry too much. You will get the understanding later, by practice and experience.