Roon and Streaming Services

A probably basis question about Roon.

I currently use Roon with Tidal but am thinking of switching to Qobuz.

When I activate Qobuz will Roon keep all of my albums, artists and tags etc intact?  In other words, are those items stored in the Roon memory rather than the Tidal memory?

And if one were to have both services ( not sure why one would ) how does Roon determine which one to use for a given selection ?

Once again, pardon my digital lack of know how and thanks for the help.