Don't know What to Do

Hello all... Any input would be greatly appreciated. I own a Premier Lifetime two tuner and just purchased a Roamio Lifetime four tuner because the two tuner just wasn't enough! Can these two Tivos communicate with one another such as watching shows on the Premiere that are recorded on the Roamio? Can the Premier use the Roamio's tuners like a mini does?(house is Ethernet wired). In your opinion would it be better to just try to sell the Premier and buy Minis for the other rooms. Don't know what is best...Thanks