Edit: They split it into categories a pick a winner in each and then somehow pick a 'best overall'. I like the Tesla but I don't understand how they can pick a 'best overall'. It doesn't seem like something that can easily quantified fairly. It's also worth noting the Tesla is over $30,000 more expensive than the most expensive winner out of the other categories.
Taxes in other countries means that cars get different engine, so for example in the past we used to get Audi with the power tweaked down in Belgium.
Also Tesla is a lot more practical in Belgium (small dense country) than in Spain (where energy is expensive, there is no supercharger and your regular electricity contract is 15A (220V), so not enough to charge a Tesla properly in the average dwelling)
There are so many factors, it is better for consumer magazine to focus on a single country.
That said, the Model S is supposed to be very nice and is a cool advancement for the industry over 'yet another model year of Civic/Focus/whatever'.
One of their big things is holding companies accountable and trying to promote truth in advertising and shame those that violate that trust, so if they see a company spinning as hard as Apple does, they're likely to call them out for it.
So a factory for Duracell AA batteries might simply rebrand the batteries that to not meet their QA bar as "off-brand" batteries. The slightly defected or substandard batteries could then be sold to the consumer for a much lower price than the Duracell branded batteries, without risking damage to Duracell's brand.
In fact at times I have purchased OEM hard drives through the Apple store instead of on Amazon.
My theory being that a manufacturer would (and this is important) be more likely to send their "A" production to Apple and do a better job of screening defects.
Might not be important for a laptop bag but a mission critical part I'm willing to pay a few extra dollars.
It's not a new concept in business that the better and more important customers [1] get better product and service.
[1] Ever try to hire through a temp agency? You don't get the same crop of people that the big guys get who give them a lot of business.
And LG, for example, assembles worse monitors than their competitors, who are using the same panels LG sells them as an OEM...
As for the Tesla, eighty thousand dollar cars better be damn good. If Tesla can snag similar praise making a car for thirty thousand then I might become a fan.
"Would you recommend this product to your friends or family?"
This test is used as an important indicator for healthcare. Improving this score is nationally important in England and all NHS providers have to try to ask all service users this question.