5- These two sound like they could pass off as an alternate version of each other, and to be quite honest, seems pretty lazy, unless It's remixed a bit in one of them.
4- These two are pretty alike, they have a few parts that deviate away from the theme, but that's not necessarily a bad thing sometimes.
3- To be honest, I'm not sure. It sounds sort of in the middle, but it sounds quite different.
2- These aren't that alike at all. maybe one or two parts of the song sound alike, but that's it.
1- Get your hearing checked, OP. These sound nothing like each other!