Which gas is better Optimism or arbitrum?

Could you please elaborate on the comparison between Optimism and Arbitrum in terms of gas efficiency? Which one offers better scalability and lower transaction costs? How do they differ in terms of network congestion and throughput? Additionally, which platform is more suitable for different types of decentralized applications? Could you provide some insights into their respective advantages and disadvantages? Finally, based on your expertise, which gas do you recommend for crypto enthusiasts seeking to minimize fees and maximize performance?