This listing claims to be a 2020 Tesla Model X 2020 Model X | Tesla Is this any different than the currently selling Model X? I'm confused
No different. Tesla doesn’t do model years beyond their legal obligations - they make rolling changes to the line when they are ready, usually near the start of a quarter. In past years, new MY VINs showed up right around the first of the year. This time they are earlier, for reasons no one has explained that I’ve seen - but as far as we know the cars produced with 2020 VINs aren’t different from recent 2019 VINs.
There was one recent change to the Model X. They have new front seats. Tesla updates Model X with new front seats for more space and seat pockets - Electrek So the 2020 may have the new seats.