When I went to get my rubber floor mats for my 2013, the parts department said my car was a second build car. It was manufactured on 12/18/2012. Don't know if this helps because I'm not sure if ALL parts are labeled as "Job 2" parts but I do know the floor mats have a different part number.
I would imagine a total rebuild would be a logistical pain to reassign new part numbers to parts that are cross 'Job' models. From what I would think is that any part numbers that differ this would mean those would be the areas that were different between designs.