Day is less experienced than Solich, but much more highly regarded as an offensive mind. Ohio State also won't have the difficulty in recruiting Solich did - kids went to Nebraska because of Osborne so once he left it was a tougher sell, top 5 program or not. Sure some kids went to OSU because of Meyer, but plenty of kids will go to OSU just because it's OSU.
There are similarities, but we don't really know much about Day yet so I don't think you can say for sure it's the same. Could be like the Devaney > Osborne transition, could be Osborne > Solich. Could be a Tressel > Fickell transition, but I doubt that one. If it goes south, it'll still take a few years.