Is arbitrum or Optimism better?

Could you possibly offer some insights into which platform, Arbitrum or Optimism, might be a more advantageous choice? I've been hearing a lot about both of them in the cryptosphere, but I'm still not quite sure which one aligns better with my investment goals and risk appetite. Arbitrum seems to offer some promising scalability solutions, while Optimism appears to have a strong focus on user experience and ecosystem development. Could you elaborate on the key differences between the two, and perhaps provide some perspective on which might be more suitable for long-term holding or for leveraging in decentralized finance applications? I'd greatly appreciate your expertise in this matter.