What advantage did British motor torpedo boats have over American PT boats?
Short answerNeither design was universally superior: British boats were shaped for rough, close-range Channel and North Sea fighting, while American PT boats were optimized mainly for Pacific operations.
NotesThe two boat families cannot be ranked sensibly without considering where they were expected to fight. British boats emphasized rough-water performance and close combat in the Channel and North Sea. American PT boats were largely adapted to Pacific conditions and missions. Their joint use in the Mediterranean is useful precisely because neither design was a perfect fit there, yet both could still perform effectively.