What differs between ship-launched and submarine-launched versions of the same torpedo?
Short answerMostly their shape, launch interfaces, starting systems, and placement of platform-specific fittings.
NotesA submarine tube imposes different shape, interface, and launch requirements from a deck-mounted launcher. Starting mechanisms and the placement of external fittings must match the platform. The underlying warhead or propulsion family may still be related. Weapons sharing a name can need distinct surface- and submarine-launched variants.