Right now I use a Nikon 50mm 2.8 enlarger lens, exclusively print B&W and am wondering if the APO series of lens currently available will make a difference when printing onto FB paper. I don't use T grain films usually but use mostly Fuji Neopan and Acros developed in Xtol, Rodinal or HC 110.

On the B&H website, there are 2 available, the Schneider 40/2.8 APO-Componon HM http://www.bhphotovideo.com/c/produc...Enlarging.html and the Rodenstock 50/2.8 APO-Rodagon N http://www.bhphotovideo.com/c/produc...Rodagon_N.html

I do use APO lenses for my 6x6/6x7 and 6x9 negatives but I don't have anything to compare it to as I have no other lenses.

1) is the 40mm Schneider lens a focal length that would be appropriate for 35mm negatives?
2) would tonality be improved using an APO lens?