The Type 93s are just notable because you have the options of a few different kinds of torpedoes for each launcher (sort of like the different kinds of HE shells). Both kinds of torpedomen can use them (but note that the launchers are only useful on a handful of DD/CL), so the only difference between Hyper and Special Torpedomen is in the Torpedo ability. And there, Special does rather better:
http://www.navyfield.com/board/view.asp?Num=138188&Sort=A03
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