While this is really a printing forum question, we seem to be doing a good job of handling it here, so I'll throw in my 2¢ worth as well. MTF curves are readily available for both lines of lenses from their manufacturers. Of the APO models, I personally prefer Rodenstock in the 50mm length and Schneider's 90 in the 100mm category.(posted 8365 days ago)The f/4.5 90 is really pretty amazing, delivering its best performance at f/5.6. That enables higher sharpness than a lens that has to be stopped down to f/8 or f/11 (see Ctein's book Postexposure) and shorter enlarging times--especially handy doing 16x20s with a slow paper or denser negative.
The worst of these lens options is, however, wonderful. Best wishes.