Ethereum is just a little bit a like of bitcoin. It has its own blockchain. It has its own platform and it has its own application called ethereum application. Some says Ethereum is the best coin in the crypto but for me I still for bitcoin because bitcoin is still the king of coins.
Bitcoin is called the king because Bitcoin was created many years ago. ETH is still new to everyone. I think that after five years it is possible that ETH will replace Bitcoin and become the king of crypto