So, I added on the Photo studio and Regional Differences page about the some poses in Group photos were changed.
Here's all the ones I could find, I don't know how they look in other versions other than the NA and JP versions because I only own those two.
Simple White Japanese version
Promo (Rock & Roll) NA version.
Promo (Rock & Roll) Japanese version
Promo (Metal) Japanese version
Simple Gray 2 Japanese version
Promo (Rap) Japanese version.
Simple Green (NA version)
Simple Green (JP version)
Promo (Opera) (NA version)
Promo (Opera) (JP version)
Movie Poster (NA version), it's a bit hard to tell.
Movie Poster (JP version)
Tropical Beach (NA version)- They're leaning in more.
Tropical Beach (JP version)