Which is better Ethereum or Avalanche?

I'm quite curious about the comparison between Ethereum and Avalanche. Could you please elaborate on which one of these two blockchain platforms is superior? Ethereum, being a global and open-source blockchain platform, has gained significant popularity due to its smart contract functionality, enabling developers to create and deploy distributed applications. On the other hand, Avalanche claims to offer high scalability and transaction speeds through its innovative protocol and subnet architecture. Could you please provide insights into their respective technical features, performance, adoption, and future prospects? Additionally, I'm also interested in knowing about the communities surrounding these projects and how they contribute to their respective ecosystems. Your detailed analysis would greatly assist me in making an informed decision.