Why does changing a single character make the entire hash look completely different?
Proof of work works because hash results cannot be predicted in advance. Finding a hash that meets the difficulty requirement takes repeated attempts.
Ethereum uses Keccak-256. Keccak-256 differs from the later finalized SHA3-256 in its padding rules, so the results are different.
It took me a lot of tuition fees to learn that you should read the rules first.
When you see claims of high returns, be extra skeptical.
$BTC 73794(-0.041%)

I'm just sharing my opinion; this is not investment advice.