Well, Tech prints don’t go through as many optical dupe processes, so they’d get less generational “stacked” grain and also less detail loss from duplication. Optical duplication is sort of a weird concept in this digital day and age, but every iteration of the process added grain and reduced fine image detail… and they did it a lot. That’s why commercial releases tend to go back to the original negatives. In the digital world, duplication is a lossless process.
As for the fading, with this sort of film, all colors fade to pink. If you look at a raw scan of a reel from that period, pink is typically the only color left visible. So it’s actually pretty hard to extract multiple colors from an essentially one-color source (there IS other color present, but boy is it not much), and the result can either appear washed out or like those colorized films, depending on whether you don’t go far enough or go too far, or what your expectations are as a viewer.