Just for accuracy's sake: 6.5 TPS is for simple ADA transfers. For simple ETH transfers, Ethereum can do 56 TPS. The 15 TPS includes complex DeFi trades, NFTs etc. Complex DeFi on Cardano is restricted to 0.05 TPS (UTXO limit), and for simple contracts - maybe 1 or 2 TPS.

— polynya (@apolynya) October 17, 2021