Nexus S was created on 2010-12-16.
Since the question doesn't specify what Nexus the person is comparing it to the Nexus S, here's the order of Nexus phones (and by manufacturer) to date: -HTC Nexus One -Samsung Nexus S -Samsung Galaxy Nexus -LG Nexus 4 -LG Nexus 5
GT Nexus was created in 1998.
Shimano Nexus was created in 1995.
Nexus Music was created in 2002.
The Infernal Nexus was created in 2001.
Since the Nexus S, Google brought out the Galaxy Nexus, Nexus 4, and Nexus 5.
Nexus Polaris was created in 1997-08.
There are only a few differences between a Nexus S and a Nexus S 4G. Nexus S is T-Mobile phone, while the Nexus S 4G is a product of Sprint's Samsung. The only other major difference is that the 4G version offers Google Voice.
Nexus - film - was created on 2011-08-16.
Nexus One was created on 2010-01-05.
Ultraman Nexus was created on 2004-10-02.
Zero Nexus was created on 2008-03-12.