How Does a Hybrid PoW/PoS System Compare to a Multi-Algorithm PoW System in Terms of Security?

A hybrid PoW/PoS system uses both mining (PoW) and staking (PoS) for consensus, often with PoW for block production and PoS for finality. This offers a layered security model.

A multi-algorithm PoW system only uses different mining algorithms. The hybrid system provides a stronger defense against a 51% attack because an attacker would need to control both 51% of the hash power and 51% of the staked tokens, making the attack cost significantly higher and more complex than a purely PoW or multi-algorithm PoW attack.