I think long term ETH has more to offer - they also have the stability within their development team which Bitcoin is finding so hard to maintain.

The development team is also the richest in the Blockchain scene (with something like $200m in assets!)

I think this alongside the fact that transactions are actually far quicker and that it's built for smart contracts means it's much more interesting to hold than Bitcoin.

Also there will be the metropolis release sometime next year, which among other new features, it will also start to phase out brute force PoW mining and opt for PoS which means that you'll be able to earn interest on the ETH you hold - I believe this will push the price up more so as there will no longer be more coins being released & holding coins can generate even more!

I'm very interested to see what happens in the next year for ETH, but I also do think if you invest it has to be for the long term, it doesn't get the press attention Bitcoin thrives on