Both of them have a lot of dapps and they could both go to the sky.
Vitalik and Justin work hard to make their coins better too so i am not sure which one could be better in the future.What do You think about this ?
As you have said, both of them could both go to the sky. If that is what you believe, why don't you go for both?
Especially if you are not so sure about your decision, the best thing to do is to trust what you believe and just decide whether what coin you will put a higher investment.