Appreciate that, and sorry for the delay is responding (I was at a powerlifting meet this weekend, and am still recovering, lol).
Somewhere on my computer, I have a list I compiled a few years ago of all the teams overall records and inter-conference records for the 90's decade. I believe the Bills had the second-best overall record to the 49ers by only a few games and the best inter-conference record, even though they lost twice in meaningless final-week games against the NFC where they had already clinched the top seed. I'll try to find it.
As for 30 for 30, The Four Falls of Buffalo is one I have not watched. I need to buy that on Amazon Prime (it is only $1.99). Thank you for mentioning that.