I guess this is a more philosophical comment on comparing high performance sportscars in general:
As I see it, these Nordschleife times have absolutely zero practical relevance to 99.99% of the people who buy the cars they test.
I agree with @noone, and unless you are able to repeatedly compete against yourself or others on your way to and from work (which I highly doubt any sane person would try), or are a pro or semi-pro driver who actually drives on the Nordschleife, the Nordschleife times are only relevant for building a story, "legacy" or create bragging rights around a car. In other words; emotional selling points for marketing purposes.
However - since we don´t just buy a car based on it´s technical merits and looks, these times are (clearly) very important. Not as a scientific yardstick, but as a way to convince ourselves that doling out $$$$ for a sportscar makes perfect sense "because tests show I got the fastest/best car", and - let´s be honest - in many cases it´s a way to measure the length of something else
I would bet anything, that my measly Audi would be faster on the Nordschleife than any other production car driven by a regular customer - if you put Tom Kristensen behind the wheel of mine.
Remember the classic TopGear episode where Clarkson driving a Jag was humilated by Sabine Schmitz in a van on the Nordschleife? I´m guessing the sales of Jags didn´t go down, nor did the sales of vans go up following that episode, but it goes to show, that these professional Nordschleife tests are only good for entertainment and more importantly; to give customers emotional or pseudo-scientific arguments to allow themselves to purchase a particular car.
From a purely rational POV, there are close to zero rational reasons to buy a high performance car, especially based on NBR/Nordschleife results. I dunno about you, but 99% of the time I drive my car in the suburbs or congested freeways, and since getting it I have only reached 200 km/h once...for about 5 seconds. Nor have I had any real-world need to use all 400 bhp or cut apexes to save 1/10 of a second going to a client meeting. And as for the elevation differences of the Eiffel mountains? I live in one of the flattest countries in the world, so that doesn´t really help me in any way.
Nonetheless, I spent hours on end looking at reviews and comparisons, and found myself eating up any test (scientific or not) that helped me sell the car to myself.
Seeing some pro driver drifting in the snow in Finland looked really cool, I loved seeing the AMG A45 get smoked by an RS3, I love the Quattro rally heritage and I enjoyed the many other examples I could find of "my car" being faster or just "better" than other cars in its segment.
Of course, it´s all BS - because IRL there are SO many variables and situations to take into account, that comparing my car to any other "comparable" car makes little practical sense. And no professional track test "proving" that my car is better or faster, will make it a better car in the real world. It all comes down to a combination of personal preferences, taste and practical conditions.
But the reviews, stories, tests and folklore helps me to emotionally sell me on a car, that I already decided on getting.
I can enjoy sitting in my car, in rush hour traffic, listening to the engine - and ALL the above mentioned tests, stories and legacy combined with the car´s actual technical performance and sound provides me with a great feeling. Most importantly; it makes me feel ok about paying $$$ for a car that I´ll never ever beat any track records with, or win any trophy in.
And I´m guessing that this feeling is the exact reason why we even have places like Rennteam in the first place: So that we can share, compare and discuss how we FEEL about cars.