Prototype vs Production.
That makes sense. I just found this video from the 2014 Chicago auto show debut...it too clearly has a sunroof, but no doubt a pre-production model. So lame they debut them w/ options that will never be available to the consumer (it's not like they are concept vehicles at this stage). Oh well...
https://m.youtube.com/watch?v=SfyeYW2szYQ