Minnesota also runs a different system.It is not easy to tell when you are not at practice. I can’t say that the players are terrible or that they are not coached well. It is likely a combination of the two with one factor being more to blame than the other. In the end a position coach has to take ownership, although that is not for public consumption.
I do not think one scheme is any easier than the other, although most teams will emphasize one scheme more than the other. Wisconsin emphasizes gap scheme, but still runs zone. Minnesota runs outside zone very well and runs a form of gap scheme with no pullers called Duo. But zone principles are part of gap scheme also because in a gap double team, one of the players will come off the block for a backer. It all boils down to execution, and frankly, the Gophers are better at outside zone now than Iowa is.
One they I wish Iowa would go to.