Board Thread:Versus Debates/@comment-24142271-20150818121911/@comment-24757127-20150909062430

I also wonder why Tobirama invented the Edo Tensei Technique. He never used it in battle and doesn't seem like a person that kills ninja just to have them as resurrected reserves in a bind. He developed a fighting style too but labelled it a Kinjutsu almost immediately. It's something you need to prepare well before a battle and you wouldn't use it for a simple 1on1 but probably for a world war.

Remember Kisame is also a swordsman so he doesn't technically have to dodge Tobirama's sword attacks but counter them with Samehada.

IMO I am putting the edge to Tobirama because we don't know all of his fighting style and if he used other chakra natures other than water release.