As I said above, go check out how Aston Martin builds cars by hand and you'll see the difference. They don't allow imperfections and each engine has the builders name on it. They don't charge $150k a car just because of a luxury badge on the front. That's what I mean by hand crafted.
I am not doubting that there is a difference, nor am I even doubting that the Aston is of higher quality. I am pointing out that while manufacturing method is objective, quality is not. You are talking about two different things.
Better statements would be "Astons are higher quality than Teslas" (subjective), or "Astons are made by hand and Teslas are not" (objective).
Here's an example of their level of effort: http://www.youtube.com/watch?v=NH_JaKvqdh4
Is that good enough for you? Or do you still need clarification? Because I can cite 90+ years of history.