Life Lesson #32: There will always be something you know, that someone else doesn't. There will also always be something that person knows, and you don't.
Don't compare when all you've got to go on is a few pieces of information that fall within the range specified above. XYZ is not smarter than you just because XYZ knows what the word "cache" means and you don't, despite your college education and eight additional years of life.
I have my expertise. You have yours. Stop harassing yourself.