FWIW, I think you'd get more of a difference between various types of lenses than makes. Depending on what you're shooting, you might be able to work this to you're advantage if you've got a selection with you to choose from. Right now I have three lenses very close in focal length: A 10"/250mm WF Ektar, a 240mm G-Claron, and a 10.4" Cooke. They each have a distinctly different "look" I find I can use to my advantage, depending on the subject, contrast, and light. Thats really part of the fun of vintage glass(though the G-Claron isn't exactly vintage! I doubt if you'd have this much variation among like focal lengths in plasmats by contemporary manufacturers like Schneider, Nikkor, and Rodenstock. Good light!