It is true that the N75 is DX only. And that is an advantage. However, you can set exposure compensation to, in effect, get the speed you want.
I have had to do that with some pretty high end P&S cameras n the past.
Not sure how DX only is an advantage…. And of course there are work arounds, but it is so much nicer when you don’t need work arounds.
Also it offers exp compensation in +-3 ev. Which means the lowest you can effectively set it to is ISO 12. And the highest is iso 800.
So w non DX film you got a range of 12-800. I shoot a lot above that, and actually more below that, enjoying the films like Lomo Fantome iso 6, FPP Blue Ultra iso 3, Slow Your Roll iso 1.6
Of course you can shoot in manual mode and do the math, but the bummer there is not just the math part… but the fact that as the camera has only one control dial, to change aperture you have to hold down a button, and then turn the control dial.
You don’t have to deal w any of this grief w an N80 because you can set ISO manually, it has two control dials etc.
Of course at the time these cameras came out they were aimed at different market segments, with the corresponding different price points so it made sense that the N80 cost a lot more, as it offered a lot more. Problem is today on the used market the N75 and N80 are pretty much the same price.