Real world example time!
all of these photographs were made with a Leica M2, a 50mm f/2 Summicron Dual-Range lens, Ilford FP4+ exposed at box speed, developed in D76 1+0. I have made identically sized prints of all the images on Fomabrom Variant fiber based paper. While the images reside on different rolls of film, they were processed identically.
all scans were made on the same scanner, no less.
Conclusion? It really doesn't make any difference whether you know or not.