Despite motors in diverse bacteria having the same core structure, different bacteria vary widely in their swimming power. (sciencedaily.com)
The casing is put over the fully functional core structure of the new Electrolux Ultra One Green model. (treehugger.com)
Personally, I'd recommend the IV duology over this one from a gameplay perspective, but a lot of that comes to personal preference in core structure. (nintendowire.com)