Arbitrum vs MegaETH

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.

MegaETH is an Ethereum Layer-2 designed as a real-time blockchain, with documentation highlighting roughly 10 ms block times and real-time transaction processing. It keeps the EVM developer surface while redesigning execution, mini-blocks and settlement around low-latency applications. The network uses chain ID 4326 and has MEGA as its associated CoinGecko token.