Cardano $ADA is a third-generation blockchain platform utilizing a proof-of-stake consensus mechanism called Ouroboros.
It supports smart contracts and decentralized applications, aiming for scalability and sustainability. ADA tokens are used for transactions, staking, and governance within the Cardano ecosystem.  
TRON $TRX is a decentralized, proof-of-stake blockchain platform designed for high-throughput and low-cost transactions.
It focuses on building a decentralized internet and supports smart contracts and decentralized applications. TRX tokens are used to power the network, including transaction fees and governance.