the DirectPC dish can only be used to get direcTV at 101 ( by changing the aim and LNB ) it is incabable ( w/o MAJOR/expensive modfications ) of receiving 110/119 ( simultaniously To 101 )
the DirectPC dish has only a single LINEAR polorized LNB incompatable with directTV.
the DirectDUO dish adds a single LNB capable of receiving 101 simultaniously but can not receive the other directTv sats.