The main difference between Cardano and Polkadot is that Cardano has a better stake pool than Polkadot . A stake pool is a node that contains combined stakes of various investors. The supply of Cardano tokens is a lot more than the supply of Polkadots.
Read moreWhat is Polkadot used for?
Polkadot is a protocol that connects blockchains — allowing value and data to be sent across previously incompatible networks (Bitcoin and Ethereum, for example). It’s also designed to be fast and scalable. The DOT token is used for staking and governance ; it can be bought or sold on Coinbase and other exchanges.
Read more