Many of the forms are regional and thus may be attractive to players from different regions. Since Furfrou's are spawning during this event, now is a good chance to save few extra for future remote trades.
Reminder of the regions:
Matron Trim: Available everywhere
Dandy Trim: Available everywhere
Debutante Trim: Americas only
Diamond Trim: Europe, the Middle East, and Africa only
Star Trim: Asia-Pacific only
La Reine Trim: France only
Kabuki Trim: Japan only
Pharaoh Trim: Egypt only
Heart Trim: Valentine’s Day event only
This page has pictures of the forms fwiw:
https://www.polygon.com/pokemon-go-guide/22686412/furfrou-forms-change-form-event-trims-heart-matron-dandy-debutante-diamond-star-la-reine-kabuki/
by etzav