Based on bottle pics alone, NJ and Atlantis look remarkably similar.
Both are an aqua/teal base with glitter. One of the main differences you notice in the bottle is that NJ has golden based glitter and Atlantis has silver based glitter. Also, the glitter in NJ is different sizes,
I've already posted about the awesomeness of Atlantis, if you want to see a post about it alone (just click the link). It really is an amazing polish. NJ, however, not so much (on it's own, that is). It looks so promising in the bottle, but alone, it just doesn't work, IMO. The base is very sheer, unlike Atlantis. Here's a pic of one coat of each polish: