I cant compare because I havent lived in WNY for a long time but can talk about the vibe during late 80s/early 90s
I came to this country in 1989 to UB and thought that the only sports that matter are cricket, tennis and soccer. But everywhere I went - university labs, classes, stores etc was full of Bills paraphernalia and people being (mostly) super happy on Mondays. Other immigrants who had been there would sit in front of the TVs (found on the sidewalk on garbage day) glued for 3 hours. So, having nothing else to do on Sundays, I started watching and got washed up in the excitement. Started rooting for the Bills but the deciding point of my permanent fandom was the Oilers game which was blacked out and I listened to on the radio. I have been consumed by the Bills every since. But the environment at that time around the city and Niagara Falls was decidedly rabid, looked like people had little else to discuss, enjoy and cheer for which was kinda true. It was tough to be insulated from that excitement in any part of life in Buffalo.