PoW vs. PoS should be an important topic, when reviewing a coin.
I don't think so because PoS is not a new algorithm. It was created many years ago and it was proven to be fundamentally flawed as soon as it was introduced. In other words even though PoW is not perfect but because PoS is a known flawed protocol there is no reason to compare it with PoW that is working fine.
clogging the mempools with ordinals and hashrate manipulation is being done as I type.
Spam attacks such as Ordinals can be executed on any cryptocurrency that has a blockchain and blocks that has a cap regardless of how those blocks are found.