I have never had a Nikon RF, but did have both a L IIIG and a Canon 7s. Both were ripped while living in Italy. I really liked the 7S, meter was not bad, easy to use, much better view finder than the IIIG or a IIIF. I had both Canon and Litz glass as well as a minolta 90mm, which was also very sharp. The 7S was larger than the IIIG as it has 2 mounts, the screw mount and an outside mount for the massive 50mm .90. But I always lusted after a Nikon SP with motor drive. I think it was the SP with the drive.