A comparison is being made between two Def Leppard albums, 'Pyromania' and 'Hysteria', to determine which one is considered better. The albums are being discussed in various contexts, including a 40th anniversary edition of 'Pyromania' and the 30th anniversary of 'Hysteria'. Def Leppard has been performing and their music and history are being reflected on, including a recent tour and their induction into the Rock Hall.