I'm doing one off the older beta just for the audio right now. Only way to be sure if the other one has muffled linear playback.
BTW, the date of the HBO recording is 2-19-83. Written right on the label. :)
This tape starts right on the "Galaxy Far Far Away" frame, but is complete to the end. The other tape has noticeably worse tracking on both machines, but starts in mid Fox Fanfare. No indication of what cable channel it was recorded from, as it cuts off soon as the credits finish.