Perhaps very similar to the laws of Nevada where O. J. Simpson was arrested on multiple felony counts for robbery and assault with a deadly weapon, under Wisconsin law, O. J. would face felony charges.
Under Wisconsin law, a robbery charge is a felony. The felony classification is determined by the type of force used during the robbery. If a deadly weapon is used, the felony is a Class C; otherwise, it is a Class E.
Helpful information:
Robbery - Wisconsin Law Statute 943.32
Felony Classification Under Wisconsin Law
Possible Wisconsin Felony Penalties - Jail, Fine, Probation
