Is Dot better than Ethereum?

I'm curious to know, is Dot really superior to Ethereum? I've heard a lot of buzz about the scalability and interoperability of Dot, but I'm not quite sure how it stacks up against the established leader in the smart contract space. Could you elaborate on the specific advantages of Dot compared to Ethereum? I'm particularly interested in areas like transaction speed, cost-efficiency, and the overall ecosystem development. Your insights would be greatly appreciated.