Ethereum is different because in addition to being a currency, it is also a platform. It needs "killer apps" to differentiate itself, otherwise it's just a currency, and can be discarded like litecoin and doge. I think Fred has given us reason to believe it will succeed in providing the ability for killer apps to be built on top of it, but we still have to see. None exist yet. The DAO has yet to do anything real.
Maybe just a detail, but it seemed like an important one to me.