It is a design technique that can be used for designing microservices based applications or any other kind of application that is distributed. So, it's something completely different and the difference you asked makes no sense.

There is a link on that page for the more generic dataflow based programing. I'd advise anybody to follow it and simply ignore its specializations until they master the generic one. I'd also say that any program should be designed from multiple points of view, so do not stop at dataflow.