How would Courageous or Glorious in their original gunship configuration fare against a Deutschland-class raider?
Short answerTheir 15-inch guns and 30-knot speed would let them dictate the fight, though their light armour remained vulnerable to 11-inch fire.
NotesThe comparison follows classic battlecruiser logic. Courageous or Glorious could make the Deutschland class respect their 15-inch guns while using a roughly four-knot advantage to choose whether to engage or withdraw. Their own protection would not make an exchange of 11-inch fire comfortable, so speed remains the essential defensive feature. The faster ship would dictate the range rather than relying on armour to settle the encounter.