to be honest I buy all my bikes at the thrift shop. I have bunches of used tires laying around it most all sizes. With the scooter wheel as the driver, I can run knobbies as well as road slicks. I don't really find one any better than another.
After my ride on the wet road, I have decided that, the rubber on rubber, then the tire on the wet road isn't much different from a simple chain drive on a wet road. Sure there is some difference between a wet and dry road but that is also true with a chain drive. Your traction is bad either way. Probably worse with the Rhino drive but not impossible by any means. The climb to higher speeds is slower on wet days, but you are still pedaling to start and on the turns and steep hills so not much has changed.