Considering both boxes have their own hard drive I guess not 🤔.
To my understanding of virgin’s new multi room setup is it’s now the new 360 box (with its own hard drive) is the main box. Then any additional boxes would be the new 360 mini (without a hard drive)
The problem with this new setup is any additional mini’s need the main 360 box to record content as it’s I believe streamed over your home network, so that 1TB of storage between 2 or more minis will be used up quickly. (Sky q and there multi room system have the same setup)
One PRO about the V6 had over sky q multi room has is because the v6 has its own 1TB hdd by adding 2 or more v6’s you end up gaining more storage and each box will record from its own hdd NO RECORD STREAMING IS REQUIRED.
Furthermore I understand it’s also possible to update the main v6 box firmware to the new 360 firmware (virgin should send a new remote) then replace any additional box’s for the new mini.