I think it's a strong possibility, they have to be using more than 1 tester for a project like this. I imagine this one was being used for long term reliability/durability.Sure looks like it racked up a lot of miles looking like that.
Which makes me wonder, what are the odds this is a model they're using purely to test durability, by putting on a lot of miles?
If that's the case, then there might be well over a couple dozen of them driving around.