It's like asking who is better - the inventor or the innovator? I always feel that you cannot compare the successor with the founder/inventor because if the founder didn't existed, there was no place for a successor while if the successor doesn't exist, there is no room for improvement.

I would blindly say that ETH is much better and has more use cases than BTC but that doesn't mean it's better than BTC because they are both trying to solve a problem in different ways.

From an investor's point of view, I still prefer BTC over Ethereum and any altcoin because the face value of BTC is tremendous.