My NC2 and friend's NB2

Thanks! They definitely are, and I'm not even one bit subjective :)

I know what an ND2 is, but what makes the NB/NC 2?

NB2: different front lights, different front bumper, different rear lights

NC2: different visuals (lights, front bumper) + lots of differences underneath: http://www.roadster.blog/2013/08/the-2009-roadsters-facelift.html