Somebody in the Volkswagen enthusiast group posted some photos of Model X mule, interestingly enough, in the same line of traffic behind a LEAF.
http://insideevs.com/spotted-tesla-model-x-next-nissan-leaf/
A perfect example of how perspective is everything. In the first picture it looks like the Model X mule is only slightly larger than the Leaf. In the other pictures you can see it is a lot more large.
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If they had Michigan plates, I wonder if they are back from a testing round there?
The mule indeed looks quite banged up... Did a quick lens and perspective adjust on the thing and I'd say in the photo the car looks so big because the camera lens had magnified the nose and made the rear look tiny in comparison.
View attachment 82381
I see no reason to think this is not a Model X. Especially if they were testing in Michigan... considering the Model 3 roadmap, it is hard to see why they'd have taken Model 3 mules there this yearly.
Here too, I think it is clear that these are the same car just a slight change in perspective. Look at the guys arm and see it is almost the same size as the door handle.