Allen is the better inside runner, by far. He's just unusually leg-strong -- can move the pile. Singleton is probably a touch faster and maybe a better receiver, but we really don't run anything that gets him the ball quickly in space. Think about it. He starts most plays standing right next to Allar. Same thing with the tight ends. Plays are just too slow to develop. Doesn't work when the defense can counter with speed.
Singleton made a few nice early runs, probably through failed defensive assignments. I would not bet the house that this would have continued, but I do see why not sticking with it would frustrate fans. Some may be hanging too much on those runs. There were many plays later where OSU stopped the run in the backfield. That is where Allen is a tad better. The way this game materialized I wanted to see more of Allen, with perhaps Potts as a split back wide. As it was, OSU could easily penetrate the edge and shut us down.
Give credit to OSU. Their defense played disciplined football. Their corners could match up better on our receivers than ours could match up on their's. That was the difference. It slid downhill from there because we had no answer within the game plan. Those trick plays were evidence that we had no answer.