Difference between 2.2.0 and pinnacle21 V3.01 validation rules

I was searching for difference in the rules between 2.2.0 and pinnacle21 V3.01 but I could not find much, if there is a list that shows the difference please could you share it? I could find this link  https://www.pinnacle21.com/blog/introducing-p21-community-3 but it is very high level.