When it comes to Bitcoin vs Ethereum, it is hard to choose. It is incontestable that both of them are very popular and widely discussed. However, there are some key differences. Ethereum is not a clone or a follower of Bitcoin. Etherium represents a decentralized platform, while Bitcoin serves as a digital currency. Special attention needs to be paid on their purpose. Etherium is developed to introduce a smart contract mechanism. The pioneer of blockchain is created as a payment alternative to paper money. From the currency point of view, Bitcoin currency has a fixed total, while Etherium is not fixed.