PoW vs PoS

1. Performance: PoW low limits: Bitcoin at ~5 TPS.
2. Security +1 PoW: PoS weak subjectivity allows for potential mob rule.
3. Security +1 PoS: PoW machines are relatively cheap, can be confiscated, and reused on any fork. PoS needs a 51% attack from holders. Simply acquiring 51% via buying drives prices too high.