Aside from the theming Jambo House and Kidani Village at Disney's Animal Kingdom Villas are very different resorts. There are variances in the design of guest rooms and resort common spaces, quality and quantity of resort amenities, dining options and so on. There are even differences in room classes available at each building (Concierge, Value) and the quality of balcony views available at each facility.
Topic: Which is your preferred building at Disney's Animal Kingdom Villas--Jambo House or Kidani Village ?
The Deluxe Studios at Disney's Polynesian Villas & Bungalows are the largest Disney Vacation Club has ever offered. At 447 square feet, they are 15% larger than the first property, Disney's Old Key West Resort.
But much of that added space went toward creation of a split bathroom. Placement of a vanity + bathtub in one room, as well as vanity + shower in a separate room allows multiple guests to get dressed at once. However, the added space in Polynesian rooms could have been put to some other use such as an expanded kitchenette or laundry room.