Those later 20th century "hypersonics" were basically space shuttle/ buran like craft. The shuttle and Buran were also HGVs technically lol. They were hypersonic when entering the atmosphere and were controllable to some degree even at hypersonic speeds.
HGV missiles were just many times faster than these things and probably can turn a bit more too. Useless to compare the modern HGV missiles to concept projects like СЛА-1 and СЛА-2 which never even flew. Should we also claim that Bor-4/5, Dyna-Soar and Silbervogel are HGV aircraft/spacecraft? All of those were concepts and never made it to even experimental flights let alone into any sort of service. At most it could be said that the learning from such programs assisted in the development of Space Shuttle and Buran.