I’ve experience a quite fuzzy thing: Exporting a font two times from FontLab, no known changes in the output settings.
The 1. font is the red text below, the 2. is the white text.
The only thing that was changed in between the 2. font-exports was the numbers (0 – 9) and the punctuation (,.;!?“”…) not displayed here.
It appears to be that now the Bitmaps are not the same anymore (especially the horizontal stems in a, e, s and h in the attached 300% example).
Anti-aliasing method is set to sharp in Photoshop, but this it seems has nothing to do with the different jittering in the result.
Any help or hint is highly appreciated!