Zipper is a bit more flexible due to not matching position in data structure with position on screen. Thus it's really easy to have layouts like accordion or o

Zipper is a bit more flexible due to not matching position in data structure with position on screen. Thus it's really easy to have layouts like accordion or other partially overlapping tiles, or having one big window in middle and the rest in circles around, or just adding a bit of flex based on preserving proportions.