I think neither of them is the future tbh and a combination of strong altcoins (different coins for different use cases and or features) will be the future.
Other coins are still dependent on bitcoin/eth etc as an intermediary exchange value, once it becomes easier to convert altcoins to usd (a lot of projects are working on automatic exchanges etc) then there is no reason that a newer coin with a better technical implementation becomes the new standard for a certain use case or feature. Of course it will take some time for that to happen.