. . . Basically, is the 'cron so special that I will notice a difference from my other glass?
If not, you might have a serious problem. Back when Tri-X was the 35mm speed king (except something horrible called RE-2475) I had to use a 50m f/1.4 Canon lens on Leica. Then Kodak produced T-Max 3200, and I could shoot a Summicron at twice the shutter speed. Despite an increase in grain, it made a significant improvement in image quality. At small apertures other lenses may compete with the Summicron.