Proof of Work Vs  Proof of Stake

POW: Miner is selected on the basis of their ability to solve difficult computational puzzles.

POW Vs POS

POS: No competition as miners is selected by the algorithm based on coins staked.

POW: The initial investment to buy hardware.

POW Vs POS

POS: The initial investment to buy the stake.

POW: High Energy Consumption.

POW Vs POS

POS: More Energy Efficient.

POW: Hackers would need to have 51% of computation power to add malicious blocks.

POW Vs POS

POS: Hackers would need to own 51% of all cryptocurrency on the network.

POW: Specialized equipment to optimize processing power.

POW Vs POS

POS: Standard server-grade unit is more than enough.

POW: Eg. Bitcoin, Ethereum, etc

POW Vs POS

POS: Eg. Cardano, Solana, etc