Solana functions as an open-source blockchain, supporting smart contracts on the other hand, Cardano is a decentralized proof-of-stake blockchain platform.
Solana has a native token, SOL, used to pay transaction fees and reward validators. Cardano also has a native token, ADA, used for staking and governance.
Both Solana (SOL Cryptocurrency) and Cardano (ADA Cryptocurrency) are strong projects with solid fundamentals.