Is this the same Miller where the courts ruled in a case against an undefended dead guy that NFA, which now is amended to outlaw registry of new automatic weapons, was constitutional because it was just a revenue collection law and preserved right to military-type weapons?

No, different Miller. This one is from 1976.

A third Miller was involved in the free speech case, Miller v California in 1973, that resulted in the "Miller test" for obscenity which is pretty much the law today.