Since the launch of Ethereum, it has outperformed Bitcoin in only 15% of trading days. Since Ethereum began trading in mid-2015, Ethereum has underperformed Bitcoin 85% of the time. Analyst James Check shared this data on the X platform on April 8. The data provided by Check shows that in the early stages between 2015 and mid-2017, Ethereum outperformed Bitcoin significantly. Additionally, in late 2019 and early 2020, the Ethereum-to-Bitcoin ratio briefly favored Ethereum. However, over the past five years, Bitcoin has consistently outperformed Ethereum.