Both have their own pros and cons but in terms of marketcap Cardano is way behind. It was once called as an Ethereum killer but failed due to delay in development of it's infrastructure. In terms of investment both are coins that provide staking opportunities and both should be kept for long term gains.
We all know that Ethereum is one of the largest and most popular platforms in the cryptocurrency market.Many people can easily tell just by looking at the cryptocurrency market that Cardano is lagging behind Ethereum. When the Cardano token came to the market, many thought that this token might compete with the Ethereum coin.However, later on, it was no longer the case that the price of the Ethereum coin increased in the same way that the price of the Cardano token did not increase in the same way.