Duel of pianos

Can melodies from The Godfather, Pirates of the Caribbean or Ambulance, supplemented by symphonies by Smetana, Shostakovich or Mozart, be heard from the same stage? Are Bob and Bobek or ABBA better in piano performance? What do the compositions Vltava and On the Beautiful Blue Danube have in common? Were the Chalupáři really fans of the Humeberto Circus? What would Osudová sound like if Beethoven were an optimist? Was Mr. Tau's bowler hat more powerful, or Arabella's ring?