Update:
Last week i had the chance to alternatively use the Nikon F2AS (1977), Canon old F-1 (1971) and Canon New F-1 (1981).
Comparing the New F-1 versus the Nikon F2, and also against the Nikon F3 (which i've used extensively -- by the way, it was introduced 1980 approx.):
The Nikon F2AS i like much more than the F3. I will sell the F3. The viewfinder is as bright and good as the one in my F3. The "match" metering with the LED lights on the F2AS viewfinder is way, way better than the implementation on the F3. And i almost never used the auto mode on the F3. Also, i don't care for TTL OTF flash.
Now, the Canon F-1N ("New") i prefer more than the Nikon F2. The viewfinder is the brightest i've ever seen, with excellent image quality, and even better than the (already good) finder on the F2. The ergonomics i find slightly better on the Canon. Also, the Canon feels sturdier in my hands than the Nikon F2; which gives me a pleasant psychological state-of-mind which I feel contributes to the usage. Both meters are equally reliable and good. But the display of the F/stop and shutter speed is clearer to see on the Canon.
I'd say that the Canon F-1N is a slightly better machine than the Nikon F2. The Canon F-1 (old, 1971 version) has a noticeably dimmer viewfinder than the Nikon F2 (F2AS, 1977 version). However i love that Canon as well.
All in all, any of those three cameras are IMO the best purchases for a lover of Nikon or Canon "classic" cameras. Any of them is a great machine, supported by an excellent and extensive array of lenses.
In this experience, my only surprise was that in general Nikon lenses are slightly better built than the corresponding contemporary Canons, while the Canon F-1 camera is noticeably better built than the Nikon F, F2 and F3!!