This poster compared Radio to Yuna. That's where the Yuna comparison comes from.
And yes, Liza has been more successful than Radio because she has won major competitions that Radio cannot win, puberty or not puberty. Radio has been a consistent second-tier skater, who's always on the scene but never good enough to win the major competitions. That's not a queen.
alright already, Radionova is a 2nd tier skater as you said