I see nothing to change my mind.
So it does not matter that it is a beta ?
The website shows a Spit II
in the 1940 list-sort, with the same appearance.
Spit 1 is correct, also players will be able to choose their own skins, so it's no big a deal imo as everyone will fly in a skin they want anyways.
Also you know that the Spit 2c was armed with 2x20mm, right?