I have the Nikkor and Canon lenses.
The Nikkor optical formula went unchanged from the 1950 chrome lens to the 1980's AIs series when it was discontinued. Nikon multicoated it, but the formula stayed the same. I have one of those, too.
The Black Canon lens is shorter and lighter. It is also quite sharp. Performance is a tossup between the two, they are not expensive, buy one of each.