If it's Sansui, buy it, until the models hit the 1980s. Even then the AU series were and are very desirable, no matter what year they were built. Sansui started to put out products in the eighties that were not up to their previous standards. I have never seen any AU model, other than the AU-D9 I grabbed at the flea market for next to nothing. It is the only blackface I have ever purchased that wasn't a huge disappointment.
If you can, buy both of them. You will not be sorry.