Pretty sure Capone dressed like many others and didn't have a unique style. Wearing black shirt + jeans everyday (or perhaps as a public persona) is obviously intentional. I'd say those are like a football coach always wearing a fedora (Tom Landry) or a rapper always wearing a giant clock around their neck (Flava Flav) to name a couple of examples.

That said, I really don't care if they copy Jobs. I can think of several entrepreneurs I'd love to copy in an attempt to channel whatever insights they might have had.