Solana for DeFi
Verdict: Superior for high-frequency, low-margin applications.
Strengths: Sub-cent transaction fees enable micro-transactions and novel fee structures (e.g., Jupiter's per-swap fees). Near-instant finality (400ms) is critical for arbitrage and liquidations. High throughput (~2k TPS sustained) supports complex, composable protocols like Drift and Marginfi.
Trade-offs: Network instability can disrupt operations. Smart contract logic is less flexible than Solidity.
Ethereum Rollups for DeFi
Verdict: The default for high-value, security-first protocols.
Strengths: Inherits Ethereum's battle-tested security and decentralization. Massive TVL and liquidity concentration on Arbitrum and Base. Mature tooling (Foundry, Hardhat) and standards (ERC-4626). Predictable, though higher, fee costs.
Trade-offs: Fees ($0.10-$2+) and slower finality (seconds to minutes) make high-frequency strategies non-viable.