Both have their own blockchain network, and both have the capability to generate utility coins using their network. They also have the same potential in the long-term holdings. Now, when it comes to stability, they are different, although they can be said to be stable crypto assets in this field of the crypto space.
That's why Ethereum is more established compared to Solana in terms of community and experience in this field. Now, if we talk about which of these two you will get more earnings, that depends on you, but if you ask me, you will get more profit in Solana compared to Ethereum.