While I have no experience with the 1N, I can say without reservation that the F5's meter is definitely better than the 1V's IMHO. I'd imagine it depends on wether you are shooting print or slide film, but for slide film, the F5 tends to preserve the highlights better than the 1V. I've noticed that if there is a decent amount of shade in the scene the 1V will try and correctly expose the shady area, blowing out the highlights. Now I've never shot print film before, but I have read that with print film you should expose for the shade, and the highlights will take care of themselves. Not true with slide film, if you overexpose the highlights, the image is junk. I can say that I have never had an occasion to where the F5's meter overexposed a slide image, EVER. I would imagine that the 1N's meter would tend to be biased the same as the 1V's. The 1V has 21 segments in its matrix, how many does the 1N have?
Jared