Does a submarine's historical kill record make it the best submarine hunter?

Is another submarine necessarily the best submarine killer?

The answer challenges that assumption by citing only one known submerged submarine-on-submarine kill.

A recalled conversation applies the idea of a better tank being the best tank destroyer to submarines. The reply challenges the assumption that submarine-on-submarine kills must be common. It cites only one known underwater case, with another participant stressing the limits of what is publicly known. The example cautions against using the analogy as sufficient proof of which ASW platform is best.