For me, it's crucial to assess the goals of these two blockchains. Ethereum, for instance, is a well-established and robust blockchain with a myriad of projects and consistently good growth. On the other hand, Polkadot is a relatively new blockchain but comes with its advantages, such as scalability and transaction speed. Considering the investor's perspective, I would lean towards ETH, given its track record and stability. However, from a blockchain standpoint, especially in terms of speed and scalability, Polkadot stands out.