they have strong strange princesses in a post-apocalyptic atmosphere. both nausicaa and Arete feel for creatures that are scorned be man. the big diffrence is one is fantasy and the other scifi. Post-apocalyptic fantasy?
Both have the same atmosphere and mood. There is a whimsical nature to them. Both are fairy tales/children's stories that take place in a somewhat medieval world with bits of sci-fi and fantasy woven in. Where Arete is about a princess who yearns to experience the outside world, Kino is about a traveller who explores the many unique countries in the world. Even the art, character design, and tone of color is similar.
Super similar moral but completely different presentation. Same studio. Mind games is BRIGHT and CHAOTIC. whereas Princess Arete is muted... and slow...
Bolth are amazing in there own way. Im my opinion, you watch these two films and you know how to live life.
Fractured fairy tales starring cursed princesses who fight against fate (and evil wizards). Both tell stories about stories and the power they hold, and both critique romantic concepts of princesses and knights. Both feature talking animal people. Tutu has more comedy and intense emotional highs and lows; Arete is more laid-back, contemplative, and at times lethargic. But if you love one of these princesses, odds are you'll like the other, too.
Both of these anime have a similar calm, pace. Both are starring little girls. Tonari no Totoro is a bit more about the joy of innocence, where as Princess Arete is more about appreciating the little magic of life. I may be going out on a limb to say I prefer Princess Arete, but I hope you enjoy both!
Also either can be appreciated at any age.