Gamora or Lady Shiva,,in a display of martial arts?

Who has more skills? Just looking for opinions as I know the characters, but not as fully as I should.

Gamora . shiva knows and mastered most of earthly martial arts, and has a killer attitude . but Gamora has mastered most of the universe's sentient races forms of combat taught to her by the Universe's number one bad ass ... Thanos himself.

universe > a single world ...... Gamora wins

This guy has a better shot:

http://www.killermovies.com/forums/showthread.php?s=&threadid=377194&highlight=title%3A%28Gamora+vs+Karate+Kid%29+forumid%3A77