I don't think that either is necessarily better than the other. Hashirama has one of the most unique and prized abilities in the series, but on the other hand Tobirama has a S/T technique and Edo Tensei. Their personalities have nothing to do with their abilities and strength. And the way that Tobirama treats his brother certainly has nothing to do with respect and power.
One of the big points of this chapter is to show the differences in the Hokage and how those differences can be related to current characters. Hashirama and Minato are considerably less serious than the other Hokage, and can be clearly compared to Naruto. Tobirama is much more serious and analytical, and he can be compared to Sasuke. This doesn't mean that one is necessarily better than another, but rather that they had different approaches to the same problem. Hashirama, like Naruto, always seeks understanding and friendship. He also loathes war. This does not mean that he cannot defeat an opponent if necessary. Drawing the comparison to Naruto, if Naruto had simply killed Nagato instead of reasoning with him, then the people of Konoha would have never been brought back to life. On the other hand, Tobirama is cold and calculating. This led him to distrust the Uchiha, which in turn led to all of the current issues within the village. Drawing the comparison to Sasuke, Sasuke pursued his brother and eventually killed him, without hesitation. Afterward, however, Sasuke resents his decision and is seeking to rectify his mistake by destroying Konoha. The difference this time, is that Sasuke has finally realized that his information is not necessarily reliable and thus sought out the knowledge of the Hokage before making his final decision.
If you consider Naruto's relationships throughout the series, Naruto has always been considered as relatively immature, and yet he is clearly the most powerful character in the series. Furthermore, everybody else, including Sakura treat him like a child, but not because they don't respect him, but because that's the way their relationships are. It is likely the same with Hashirama and Tobirama. They are brothers, with Hashirama being more childish, which would make Tobirama like Sakura in their relationship.