POW vs POS

POW:  Proof-of-Work, or PoW, is the original consensus algorithm in a Blockchain network. In Blockchain, this algorithm is used to confirm transactions and produce new blocks to the chain. With PoW, miners compete against each other to complete transactions on the network and get rewarded. So, the more mining power one miner has the more block he will get block reward. Here, The Mining power of POW depends on the quality of mining device and Electricity power. For example: Bitcoin Blockchain.

POS: Proof of Stake (PoS) concept states that a person can mine or validate block transactions according to how many coins he or she holds. This means that the more Bitcoin or altcoin owned by a miner, the more mining power he or she has. For example: Etherium Blockchain.

PoW vs PoS showdown: which is more centralized?