Is Cardano really better than Ethereum?

Could you please elaborate on why some believe that Cardano might have an edge over Ethereum? Is it solely based on its technological advancements or does it also include its approach to governance and scalability? Furthermore, how does Cardano's proof-of-stake mechanism compare to Ethereum's transition to proof-of-stake? Additionally, considering the vast ecosystem and community support surrounding Ethereum, how does Cardano plan to compete and potentially surpass it? Lastly, what are the potential risks and challenges that Cardano might face in its journey to becoming a superior blockchain platform?