Edited sentence: George Lucas has also said that Obi wan was the greater force user of the two and would have triumphed over Darth Vader.He was also the greatest swordsman ever to live besting such prominent swordsman such as Master Yoda, Master Windu and Darth Sidious.He was the third strongest jedi in terms of force ability succeeded only by Master Windu and Msster Yoda.If the battle had continued however Obi wan would have triumphed over Vader as Vader wasn't as powerful as he lost a lot of force ability when he was placed in the black armour