Try listening to the Howls Moving Castle theme and Carl Goes Up one after the other. They compliment each other beautifully. There’s a strong spiritual bond between these two scores I swear.
Of course the feel is very different. One is grand, sweeping and magical, the other is light and hopeful, But both films have those soft moments of love, wonder and nostalgia running through, And of course, the essential similarity, flight! just listen, you’ll see what I mean.