Paul and Buster are just two very different people.
Buster seems to be reliable, responsible, hard working young man, keeping a low profile.
Do you remember the things Paul said in the hospital? His crude, sick remarks, his sexist come ons to the staff, the arrogant pompous entitled attitude towards everyone. His lies about the death he caused? He was about to bring his whole family down with these upcoming lawsuits and investigations. He was an out of control, narcissistic, entitled punk.
Guess the apple didn't fall far from the tree.