Shizuha is the one with the Autumn Leaves in the Hair. The most of time she also wears a dress that ends in cut-out Leaf Shapes at the Bottom. And her eyes are more of a gold-orange-color.
If they don't wear the normal outfit notice the clothes. Leaves are a common print for Shizuha's clothes and Wheat or Grape Print is common for Minoriko's Clothes.