What made the Bayern class inferior to the Queen Elizabeth class?
Short answerThe premise is misleading: Bayern was a strong line battleship comparable to Revenge, while Queen Elizabeth paid for extra speed and future growth space.
NotesQueen Elizabeth spent more machinery, hull, and internal volume on speed for the fast wing of the fleet, while Bayern and Revenge prioritized the battle line. Germany could fund a strong 15-inch-gun line battleship but lacked the budget for a Queen Elizabeth equivalent. Revenge receives the stronger armour-scheme assessment in this comparison, while Queen Elizabeth offers more speed and space for later modernization. The fast wing was intended to prevent an enemy turning the battle line or crossing its T. The British fast battleships' larger hulls later made extensive modernization easier.