I started with a 6 element El-Nikkor 80mm and only print b&w on a Beseler 23c with dichroic head. Later I bought a bunch of gear when my local darkroom at the community center closed and acquired a Rodagon 80mm f4 (At the time I thought it was a 50). Realizing I had duplicate lenses (IIRC the Nikkor may have been f5.6 so advantage Rodagon) I decided one had to go so compared a really crisp 645 Delta 100 image printed back to back and the Rodagon seemed to have a very slight edge so I sold the Nikkor and kept the Rodagon. The difference was very subtle and could just be sample variation. Didn't slow me down from later buying a El-Nikkor 50mm because they are such great bargains.