NXT has already launched and has much talking about. No doubt. eXocoin is not a descend or clone or anything related to NXT. Its coded from scratch. There will be features that NXT do not have. And it will be fully open source one day. You cannot be 100% sure that NXT do not have a hidden trap in there current binaries or something.
We don't want to blame NXT. It has great innovation! What we are concerned of is that about 75 people are holding the vast majority of the whole crypto. That is what we want to change with eXocoin. The wider it spreads the better! Preventing pump&dump from a single individuum to crash the exchange rates to 0.
NXT does not have a mechanism to prevent typos in transactions or to detect swapping bits in transactions. eXocoin developer will invest a high amount of time to make transactions safe! Typos will be detected as well as swapping bits within network or computer layer. You do not have to remember an address of someone. You can register, buy and sell aliases for them decentrally!