Personally, I think that at the present moment ethereum is more modern, I would say that it is in the first place for me personally. But I, as a user of ethereum, see a lot of flaws in it and see in the future an alternative in the form of a completely different and new cryptocurrency. As for Bitcoin, its only advantage at the moment is that it is the founder of a new technology for the world - the blockchain. In time, I think, he will not go far to the first place, it just takes time for the implementation of new projects and their popularization in the world.