Hamster breed?

[Josiesloth]

Hello! I have 2 little hamsters called domino and Rufus. The place I got them advertised them as Russian dwarfs and I’m a bit confused! I’ve know that the main hamster breeds are Syrian, Chinese, Campbell’s , winter white and robo and not sure what my two are. I know there obviously not a Syrian, Chinese or robo. But not sure about Campbell’s or winter white. I’m pretty sure they are Campbell’s from looking at many pictures! But just wanted a second opinion! Sorry if this seems a really stupid question! Ive linked an Instagram picture of them cause I’m on my phone and can’t add a picture. Domino: https://instagram.com/p/BfbojiBAiAZ/ Rufus: https://instagram.com/p/BfbnyKwAN5K/