I have an old Pentax 6X7 with MLU. Compared the 67II wins.
IT has a much brighter wievfinder. That is the major drawback on the older model.
The 67II has better ergonomics. It feels a lot lighter than it really is.
The 67II has multiexposure capability and the automation mentioned.
The old 6X7 has a much better sound though
Cheers, Søren