The difference is a matter of arbitrary semantics. The quote in the beginning is nothing more than a setup of an argument from authority (http://en.wikipedia.org/wiki/Argument_from_authority).

The only takeaway of value is that, yes, there can be a functional difference between designing logic and implementing it. This in no way means you can only do one or the other, or that any specific job or title dictates that you'll do one or the other.

This might as well have been titled, "The difference between a senior developer and a junior one."