I was searching for some news on the new bikes and stumbled on this. This might explain the 2 variants of the Sturmey Archer bikes that seem to be out there.

Gothamist On Problems With New Citibikes

The Citi Bike 2.0, which debuted last June, is designed by Ben Serotta, an Olympic racing bike designer. Until recently, all of his bikes were manufactured and assembled overseas, in China. The company recently opened an assembly operation in Detroit, and a Motivate spokeswoman said bikes assembled domestically have been rotated into NYC's fleet in the last few weeks.