What do MacBook Pro 2020 model codes mean?
Solution 1:
There's no 2020 or 2021 model of the 16" MacBook Pro currently. The 16" MacBook Pro only exists as the Late 2019 model - there are no others.
The codes you have refer to various build-to-order variants. For example you can buy the 16" model with 16 GB RAM, 32 GB or 64 GB RAM, there's 3 different CPU models, 3 GPU variants, 5 SSD sizes, and so on.