By and large, if the two were on the same line, Benni was right and Jason was left.
If both players are on song at the same time, I cannot for the life of me see why Sam and his team cannot coach Benni and Roque into being a devastatingly effective front line.
As Jbn comments, Benni is a very good furthest forwards player. I think Hughes' mistake was to play RSC furthest forward in a system that was geared to hit the front man with a cross leaving Benni in a complete no-man's land last season. I'd like to see Benni tried as the furthest forward in a combo with Roque as unless we buy some wingers, the crosses are just not going to come.
And selling RSC in order to afford two decent wingers would be an exercise in the utmost futility.