Sorry newbie, I dont get the PoS block creation, to much contradiction
POS distributes valid block rewards proportionally to stakers. However, majority stakers cannot be unseated if they do not wish to trade their stake. A 51% staker can control/censor the system indefinitely.

POW always allows for new hashrate to come online. If fees increase, new mining will join, thereby diluting a potential 51% miner. Because external hashrate can always be added, the Power of any miner can always be balanced That is not the case with POS.