It's the same metric. When the Elections Division of the DOJ concludes that all legitimate votes have been counted, and that no illegitimate votes have been counted... to the best of their ability; then whomever has the most Electoral votes "wins" this phase of the election; the phase where we pretend that we have anything to do with it.
But, that don't make you president.
The actual election will be 14 December, when the Electors choose the next President.

Electors usually just "go along" with the official vote in their respective states... but their entire purpose is to vote their own judgment, having heard the "voice of the people"; a few states won't let them go against the grain, but that intervention goes against the entire purpose of the Electoral College.
One or two "faithless Electors" is a common occurance. In 2016 there were 10, and three additional ones that were shot down by their respective States.
And this particular election is one of strong opinions. If Biden wins the pretend-phase, the reasons to vote against him anyway are numerous and profound. And, if you ask a Trump-hater they would say the same about Trump; though it will all just be horseshit about Russia, white supremacy, mean Tweets, or some such nonsense...

My Personal metric is common sense.. he didn’t win PA, GA, or AZ. There is no mathematical way he could. No one wants his dumb ass, only the hardcore brainwashed Democrats. Most people have Jobs and they know what’s going on. They don’t want Job killer Joe.