Mixing cable company Tivo with regular Tivo

I'm on Mediacom and have their new MG2 Tivo powered box. Similar to the Bolt. But it won't activate on Tivo.com and mediacom hasn't been much help yet. They suggested I use my Roamio Plus in place of one of their minis.

If I do that would the MG2 and the Roamio be able to see each other and share recordings?

thanks.

Mixing cable company Tivo with regular Tivo