The side-by-side comparison is compelling, but look at the date at the top. The 18 is misaligned. Is it possible that parts of the letter are genuine and parts cut and pasted?
Let's demand a look at the originals.
I want this to be true, but the LGF examples show do NOT look identical to my eyes.
VERY close, but not identical.
I do not think even CBS would sink this low. There is no way this could be contained if it was fake. They are not that dumb.
If Rather didn't have the originals, or exact reproductions of them, comparisons to the originals are irrelevant.