I'd argue that most PoS networks are not fundamentally different from the consensus algorithms before Bitcoin - the difference is they include a token as an entry point into authority, and that getting caught attacking will demerit tokens from you.
But the attack vectors are the same, and now there is an incentive to pull off an attack since the system is representing money people are willing to trade for goods. I think PoS is dangerous for this reason - same vulnerabilities and defenses but with higher stakes on both sides.
Not defending PoW wholesale, but it is fundamentally different as a network defense tool - though, it too has a reward for attacking it, so long as you can get 51% together - or less with selfish mining (network latency attacks).
But the attack vectors are the same, and now there is an incentive to pull off an attack since the system is representing money people are willing to trade for goods. I think PoS is dangerous for this reason - same vulnerabilities and defenses but with higher stakes on both sides.
Not defending PoW wholesale, but it is fundamentally different as a network defense tool - though, it too has a reward for attacking it, so long as you can get 51% together - or less with selfish mining (network latency attacks).