Arbitrum Vs Optimism: What’s the Difference?

While Arbitrum and Optimism are optimistic rollups focusing on finding faulty blocks, they implement the technology slightly differently. Optimistic rollups mainly depend on the Ethereum chain for security while Arbitrum has its own. It has its own Virtual Machine, while Optimism uses Ethereum’s Virtual Machine partly.

Another key difference is that Optimism relies on a single “fraud proof” which makes it fast but can be easier to fake. Arbitrum, on the other hand, requires multiple proofs to confirm valid transactions.