Is there a difference between "MK9" and "MK: Komplete Edition"?

I just want to know if there's some feature that is only in console version, or if it is all the same content.

Solution 1:

From Wikipedia:

On January 9, 2012, Warner Bros Interactive Entertainment announced Mortal Kombat: Komplete Edition. This version was released for Xbox 360 and PlayStation 3 on February 28, 2012 in North America and on March 2 in the United Kingdom, and consists of the game with all of the downloadable content released for it. The North American release also includes download codes for the album Mortal Kombat: Songs Inspired by the Warriors, as well as the 1995 film Mortal Kombat (available via PlayStation Store or Xbox Live)

So, Komplete Edition has 4 extra characters(Skarlet, Rain, Kenshi and Freddy Krueger) and some extra skins(like classic ninja skins).

P.S. Don't forget, that PS3 version of MK9(and Komplete Edition too ofc) has an exclusive character: Kratos.