Both Kona Cotton Solids and Moda Bella Solids are cotton broadcloth, both are 60x60 threads per inch (aka 60 square). With fewer threads per inch, the solids would logically be easier to appliqué than cotton prints, not harder. However, in my experience, there is really no difference in the ease of hand appliqué between regular quilting cottons, batiks, or Kona/Moda solids.