If you are talking about Spore, then no. An epic is another name for a massive creature that suuposidley 'rules the planet' Epic is another word to describe something outstanding, incredible.
they are the same because they are both story's and they are different because a epic poem is a long poem that tells a story of hero's and a fable is a short story that conveys a moral lesson often...
As you have phrased the question it is almost impossible to interpret it in a simple way. So if I'm misunderstand you completely I apolegize, but I would suggest that you take grater care in phrasing...