Agreed. I think you're onto something.
I've realized that the 7 really is the penultimate car for what I was always looking for, which is essentially a motorcycle in a car. There are "better" cars, there are faster cars, there are better performance cars but few if any provide the visceral go kart experience of driving the 7 with Aero.
Motorcycle riders refer to cars as "cages" because of how the cockpit separates/protects you from the elements as well acts as an actual cage around you. I don't think that term is applicable to a 7.
Even an Atom has a chassis that sits high and makes you feel more enclosed than what we are used to.
Edit: As far as comparison, you can definitely compare them, everybody has preferences. F40 to F1 are a lot closer to each other in comparison than they are to a 7.