Sora no Woto music

I've been making this claim elsewhere, and it might just be me, but parts of the Sora no Woto soundtrack really reminded me of George Gershwin's An American in Paris. I'm no music expert, but compare the following:

Sora no Woto OST - Track 2 - Ciel bleu

and
Sora no Woto OST - Track 3 - Flànerie

with Gershwin: American in Paris (I) (Rattle, Berlin Phil)