Arbitrum vs Unichain

Arbitrum One and Nova are optimistic rollups using Nitro fraud proofs that compress transactions into calldata submitted to Ethereum. The Orbit toolkit lets projects deploy their own Arbitrum Orbit chains with configurable permissions. ARB token governance manages the 3 000‑plus validator whitelist and a 1 billion‑dollar ecosystem grant fund.

Unichain is an OP‑Stack Layer‑2 built by Uniswap Labs that employs a trusted‑execution‑environment (TEE) block builder to guarantee ordered execution free from MEV. Liquidity pools enjoy baked‑in sandwich protection, and the UNI token governs sequencer whitelists. The chain inherited native hooks from upcoming Uniswap V4, enabling dynamic fee models.