Yes they are better in my opinion.
they retain the food they eat for longer meaning that when you gutload. your T.s get all that nutrition.
also they dont smell, jump, die fast and are easy to take care of . ohh and they dont smell. This is all my opinion and the idea of roaches retaining their food is something I heard about(not sure if it is a fact). either way check out the "Insects and other"... forum for more info.
ohh and not sure about the hisser vs. dubia part.. although Hissers take longer to mature.