Ethereum and Bitcoin, while both cryptocurrencies, have distinct differences in their mining processes. Bitcoin uses the SHA-256 hashing algorithm, which favors systems with the highest processing power, making ASICs (Application-Specific Integrated Circuits) the preferred choice for miners. Ethereum, on the other hand, uses the Ethash algorithm, designed to resist the advantage of ASICs, making GPUs (Graphics Processing Units) more effective. Additionally, Ethereum's block time is significantly shorter, averaging around 13 seconds, compared to Bitcoin's 10 minutes. This means Ethereum miners confirm transactions more rapidly. Lastly, while Bitcoin has a capped supply of 21 million coins, Ethereum's supply isn't fixed, influencing the long-term mining prospects.