Both are good and best tradeable coins. Both are good for investment as both have good potential . As Bitcoin is far batter than Ethereum, because BTC has higher demand and high value than Ethereum. Bitcoin is known as King of all the Cryptocurrency. Ethereum is best known for short term investment and Bitcoin is good for long term investment. Both Bitcoin and Ethereum are good in different aspects. Both has high market value and growing communities.  both are excellent platforms. but in terms of price, Bitcoin is better. however, for platforms, ETH is still more commonly used than Bitcoins. well, nowadays so many ico programs are using ETH as the base platform.