Cardano uses PoS and is therefore inferior. All Proof of Stake chains have been a downward spiral because existing holders have no incentive to contribute to the economy (hashpower/decentralization, commerce or innovation). ETH is starting to follow the same path and stagnate.
What about Ergo? It’s both eUTXO and PoW.
eUTXO is Turing complete. Ergo, Cardano and Ethereum are all Turing complete unlike plain UTXO. This means they will have a much harder time figuring out the state. UTXO chains only have to look up the TX inputs to maintain state so they can scale much faster.