[Jeir]

Are we talking about the hamsters themselves, or their cages?
Male Syrians smell the least. Female Syrians smell the most. Female dwarfs tend to smell faintly like mushrooms to me, while male dwarfs have a...strong scent, but it's no where near as bad as female Syrians.
For cages, they're all the same. It just depends on whether or not they're potty trained, and how often their toilet areas are cleaned.