Could be, Jamie... A shorter focal length means the infinity position of the lens is further back closer to the film, with a shorter bellows, and it might fold up a bit more compactly.
If I had the 80mm lens model, I'd find it hard to justify buying a second Bessa with 65mm to gain so little angle of view. But as an alternative it might be viable.
Considering a 2.1x multiplier to compare 135 format to 6x7, 105mm (~50mm) is "normal", so 80mm (~38mm) is already a very versatile semi-wide. By comparison 65mm (~31mm) isn't all that much wider, though it would also be useful... especially if faster than f/5.6 ! As you suggested in post #5, 60mm (~29mm) would distance it better from the 80mm. And I'd hope they could manage f/4 within the necessary size limits.