I have a 90mm APO-Rodagon-N, and it is, BY FAR, the sharpest enlarging lens I've ever used. Knock your socks off sharp. I'm contemplating selling some MF film gear to fund building a D810/Cambo Actus kit, solely to use this lens on it, along with a 50 and 150mm(all still to be purchased). Coming from a view camera background(I still actively shoot 4x5 and 5x7), lens movements/corrections in-camera are a big deal to me
The APO-Rodagon-N's were designed later on than the Componon-S lenses as well, not that that could be a huge difference, but Rodenstock really hit a home run with the APO-Rodagon-N series of lenses. They're stellar performers, even for non-enlargement uses, like limited macro situations/close-up.