Turnout and getting the votes to count will be the key.
As for comparing this year to 2016--far more Democratic presence for federal and state offices in metro Atlanta (city, suburbs, and exurbs). You can even go to Hall County (73% vote for Trump) and see a few Biden signs in subdivisions.
But rural north Georgia has a sea of Trump and Perdue/Collins signs everywhere.
Dawson County (80+% Trump in 2016)...I saw a Biden/Harris sign and a Joe Biden 2020 sign but both were gone within a day. I’m assuming someone stole them.