Agree with both playing in poor talent areas, but Wisconsin is a school that attracts top offensive line talent because of putting OL into the NFL with their run heavy attack and don't have a fan base with thoughts of being nationally elite. They simply want to be in the top half of the B1G West and compete year in and year out for the West.
Money wise -- it is obviously Nebraska. But no coach in CFB today, that'd take the Nebraska job, will ever be able to achieve what Nebraska fans want and 'expect'. It'd take Warren Buffett giving the program a blank check for Nebraska to be able to compete with the Georgia, Alabama, Ohio State, etc.
If Nebraska's fan base had realistic expectations, which should be on par with Wisconsin's ceiling, Nebraska would be the better job.
In the end though -- it will be the same result, no matter which job a coach takes. Competitive in the B1G West -- get the chance to be the sacrificial lamb in the B1G CCG against the B1G East champ.