while ETH and BTC are powered by the blockchain and cryptography.There are major differences between them technically. For example, BTC uses a stack based language while Ethereum uses turing complete.Other major differences include transaction time (ETH is much faster than Bitcoin) and their basic builds (BTC uses SHA-256 while ETH uses ethash)

In addition,generally, BTC and ETH differ in their respective purpose. BTC seek to be an alternative to money and become a faciliator of payment transactions while ETH is developed to be a platform for faciliting applications and p2p contracts.Although it can be said that both BTC and ETH are digitial currencies, the main purpose of ETH is to not be a payment alternative but to be a platform for developers to run DApps.