I don't know the application difference in location of the return fitting, but IIRC some take a much larger hose (~5/8") and newer ones of this style take an 11/32" hose (just under 3/8"). My 65s have the huge hose, my 68 has the smaller.
If I were in a bind, I'd take what I could find if all else was suitable.
Might require to swap the return fitting on the PS gearbox (but don't swap the whole valve to do this!)
IMHO the 11/32" hose looks better-engineered. The bigger hose looks not-well-thought-out, it's like a piece of heater hose FCOL!
And perhaps it was to hold a little higher pressure, to be able to push the return fluid that seems to return to the reservoir below the fluid-fill line?
Because it seems both of those changes happened at the same time?