Cryptocurrency Basics|How Are Bitcoin and Ethereum Different?
Bitcoin uses the UTXO model to track balances, while Ethereum uses the account model. Their accounting methods are different.
Bitcoin prioritizes simple rules and network stability, so protocol changes are very conservative. Ethereum, on the other hand, prioritizes programmability and ecosystem growth, so its protocol is upgraded more often.
$BTC and $ETH are the native coins of Bitcoin and Ethereum, respectively, and they serve different purposes.
If you're unfamiliar with a product, don't invest heavily right away. Start by practicing with a small amount.

This is not investment advice.