Is Optimism better than arbitrum?

I've been hearing a lot about Optimism and Arbitrum, two leading Ethereum scaling solutions. But I'm still not quite sure which one is better. Could you please help me understand? I've read that Optimism offers optimistic rollups, promising faster transaction speeds and lower fees. At the same time, Arbitrum boasts of its high-performance arbitration layer, aiming to enhance scalability and security. So, my question is: based on the current state of technology, ecosystem adoption, and overall user experience, which one do you think is superior? Is Optimism's optimistic rollup approach more effective than Arbitrum's arbitration layer? Or are there specific use cases where one excels over the other? I'm really eager to get your insights on this matter. Your expertise in the field of cryptocurrency and finance would be greatly appreciated.