Are there more than 1 kind of Mini?

I have Roamio Pro and Comcast. My main TV is connected to Tivo Box, Xfinity Modem, and Netgear router and all working fine finally.

Now I want to put another tv in bedroom. Do I need a mini?
And If i don't care if Tivo access is available in bedroom, do I still need a mini?

Or can the modem wirelessly get me TV reception in Bedroom?

Sorry for the lame question, but confused.

thanks