1 and 3 are definitely a "to each their own" sort of thing; I think both continuities have their ups and downs from what I know of both; I don't read comics either. #2, it's not like Power Rangers doesn't use the devices, but I suppose the "Morphing Grid" is simply a way to explain where the power comes from, which the devices are accessing, not a big deal though. Not sure why #4 is a reason, it's not like Power Rangers had their own robots that Super Sentai didn't, and having their own special term is hardly a big deal.