Undoubtedly, Ethereum is better, I'm certainly not so familiar with LINK, but ETH has already established itself as the #1 smart contract network, despite the low scalability, and still this network is used by millions of users around the world, and with the arrival of DEFI, ETH has become even more popular, now developers are rushing the issue with scalability, and then we will see that ETH will be in demand even more.