Basically, the only thing that the two sets have in common is that they both have planes. However there is quite a bit of difference on the inside of the planes. There are a lot more details in the Friends plane. In addition to the seats, there is a rolling service cart complete with refreshments, emergency lighting as well as a larger galley and lav in the back of the plane.
Compared to other major European hub airports, like Charles de Gaulle or Heathrow, CPH has a similar number of connections, but is much smaller in both actual size and passenger volumes, and can provide a calmer, more pleasant experience. Its location in the south of Scandinavia makes reaching most European destinations reasonable, and flying to destinations in the Baltic region and in Eastern Europe generally only takes half the time as from major hub airports in Western Europe.
Anyway, I think this may be my favorite LEGO City air terminal yet! It may not be as big as some previous ones, but it feels really coherent. The plane is nice as well with its white, orange, and blue stripes. I agree that Heartlake City Airport's plane has a cozier and more detailed interior, though. It does really highlight some of the differences between Friends and City, with City opting for capacity over comfort and function over flair.
Correct me if I'm wrong, but is the hangar only large enough to house the biplane? A bit of a cock-up if that's the case. As good as the planes are, the hangar is a major failing. It looks like it's only about 30-40 pieces; just a bunch of big plates, some prefab cross-bracing and ... errrm ... air. Not so much a "hangar" as an aviation-equivalent of a car port!
I cannot stress just how much I love this item, it may well be the highlight of the whole set. LEGO have released bi-planes before of similar design, but it still something to marvel over. Harking back to those older days of LEGO relying on imagination and not movie franchises, this is what we had to play with, and it is great to be able to relive that in today’s world.
Billund Airport had its beginning in 1961 when the son of the founder of the Lego Group, Godtfred Kirk Christiansen, established a private 800-meter long runway and hangar north of his factory in Billund. With Christiansen as a key driver, more of the neighbouring municipalities were included in the group of owners, and it was planned that the airport should be expanded to a regular public airport.