NXT was the first POS.
Peercoin aka PPCoin was the first PoS coin actually. NXT is the first "PoS 2.0" coin.
Entire crypto 2.0 is debatable.
Ripple was first crypto 2.0 and it set the standards (2 years ago). It offers instant transactions, ability to send any currency anywhere (you can send even USD, EUR, BTC, or airline points) instantly, asset exchange (where you have the ability to make your own order books in any currency you want), gateways (where anyone can become a gateway) etc etc.
NXT so far managed only to copy asset exchange from ripple (but in next you cannot choose in which currency to list assets etc, nor can you make your own order books, its central exchange) and will try to copy gateways (but run by devs, not by anyone) and will try to copy instant transactions (but only in nxt, you cannot transfer other currencies).
So NXT and other clones of ripple can be called crypto 1.1 only for now since they managed to copy only small part of Ripple so far.
Ripple is centralised though so most people don't even consider it in the same category. Not that it isn't an interesting idea though.