I recently took some shots on both 800 [120 size using Mamiya 7II & 150 mm lens] and 400 [35 mm using Canon A-1 with 50 mm lens] speed print film. The prints from the 800 were brighter than those of the 400. I can see this in both the negatives and the prints. I know there's a lot that this could be attributed to, but is chemistry one of them? The numbers on the 35 mm negatives were a bluish color and I was told earlier that they should be darker. Could this be due to processing the 400 film at the wrong speed? I took all the shots on an overcast day all at the same time. Any thoughts?