I have 4 EL-Nikor enlarging lenses that I have a question about. All are 50mm but 2 are 2.8 and the rest are f4. Would either be any better than the other without making a bunch of test. The 2.8 has a lot of glass, the f4's small amount of glass. I guess my question is, would the 2.8 be the better since it has a large amount of glass???
I don't have any knowledge of what makes one better than the other.

Any ideas on this?