I think that between tililal and T.A. Gardner, they've hit the bullseye. Bombs can certainly do a tremendous amount of damage from the resultant blast and shrapnel. Torpedoes may not look as devestating because we usually don't see the results. But as will bombs it only takes one well placed fish to finish off a ship of any kind. If that wasn't the case - why use Submarines??
In my opinion both can do the job and both are just as deadly.