Board Thread:Versus Debates/@comment-26704954-20160301064038/@comment-3965545-20160304005615

Another misconception that DB4 clears up.. Hashirama is only barely stronger than Madara, according to some DB4 translations only a hairs width weaker than Hashirama and DB4 says that Izuna is tied with Madara and Tobirama no exceptions. EMS itself isn't too much different than MS besides the eternal eyesight.. according to DB4 "Implanting Itachi’s eyes, the Mangekyo Sharingan, it gave him an eternal light that was turned on. It also surpassed his older brother’s ninjutsu and doujutsu." meaning his dojutsu based ninjutsu. It would be the same effect on Madara gaining the EMS logically. So the same hairs width difference between Hashirama and Madara, was created between Madara and Izuna/Tobirama when he gained EMS. so indeed Tobirama is weaker than Hashirama and Madara but only barely.

About Hashirama and Madara "They are equal in strength. Madara remained unchanged, but Hashirama changed for the sake of the village. A paper-thin difference (between the two of them) decided victory or defeat."

http://naruto.wikia.com/wiki/Thread:166010

"Uchiha Izuna

(Quote) …Don’t do it Big Brother …Don’t let them fool you

Entrusting to his elder brother a glimmer of hope* Reflecting in his eyes the stability of his clan

(*a single wish; eyes/gaze/stare (lit. pupils of the eye); stability/peace)

Next to Madara in ability (lit. true power, force), Izuna accomplished a great number of military achievements. Wishing for the stability (peace) of his clan, he entrusted, at the moment of his death, his faith (confidence) along with his “Sharingan” to Madara. He resolved in his heart that his eyes would be the ones to witness (watch over) to the future (fate) of his clan…

(Kid Izuna vs Kid Tobirama) Overflowing with talent in swordsmanship, he clashed many times on the battlefield against Tobirama, his equal in ability who would become the Second Hokage."

http://www.narutoforums.com/showthread.php?t=1012315&page=11