Open your NXT client and try the following operations :

1. Create multiple addresses in the same wallet. YOU CAN'T !! Give each address a diffrent name. YOU CAN'T !!
2. Transfer the names between addresses or transfer the name to another address. YOU CAN'T !!!
3. Put one of your names on market. YOU CAN'T !!!
4. Buy a name from market. YOU CAN'T !!!
5. Change the price of a name that is already on market. YOU CAN'T

And i could fill 3 pages with MaskNetwork features you can't find on NXT or any other altcoin.

Alias system in NXT was launched 3 months ago. It was incomplete and is still incomplete. NXT client allows you to have only one address and i think this is a BIG drawback. It makes alias system useless.