Roma as an Allied and postwar prize

What happens if the Italian battleship Roma survives the war, and who receives her afterward?

She could serve against Japan before becoming a likely Soviet prize, potentially leaving Giulio Cesare in Italy.

A surviving Roma could join further Allied operations, particularly against Japan. The Soviet Union would probably want her in the postwar allocation of warships. Receiving Roma could reduce its claim to Giulio Cesare. In that case the older battleship might remain Italian.