Usually, black's aim in this fuseki is to play a fast paced game. White's first two moves can be anything basically but here we are especially interested in a white ni-rensei as well because this fuseki pattern is quite popular recently.
Various strategies are possible from the position shown in the first diagram.
Black 1 in this diagram enlarges black's sphere of influence while reducing white's. In that sense it's a logical approach. Since the position is symmetrical black is ensured of at least one of them. Of course black can create a moyo as in the previous diagram but Kobayashi Satoru figured that one should do more with the right to play first in the symmetrical position. The fuseki patterns evolving from this move have this idea constantly in mind.