Paul and Neil’s working relationship

Is it known what both men thought of the other prior to Angelo’s bust in August 1983?

Neil’s underlings didn’t like Paul. But what about Paul himself?

Likewise, Paul wasn’t a big fan of the Bergin crew guys (although he praised Gotti’s ability to collect on debts), but what about his feelings on his Underboss?

I ask considering they worked together 9 years

It must have been a good one since they never had a serious problem but I don't think they were best of friends either. They also had to keep a lot of distance between each other, since the 2 of them getting together would have resulted in them likely being picked up for questioning and more importantly, for the publicity it would bring.