The modern apo enlarging lenses like Apo Rodagon N or the Schneider equivalent will indeed perform
significantly better in terms of sharpness and internal contrast than a Componon S, El Nikkor, or conventional Rodagon, though these regular lenses can be excellent for general use. But you can't generalize much beyond this. Within all these particular series, some lenses were better than others
for certain usages. Schneideritis is essentially an edge paint issue, and rarely affects performance,
but might be an indication of the amt of use a lens has had.