Is standard size amethyst pillow with B-shape better than D-shape mini pillow?

If you use lay on your back and use the pillow under your neck or your knees, the D-shape mini pillow may be sufficient. But remember that all of these mini pillows are hard. They are about 3 -3.5 inches in height.

The B-shape Pillow can be HARD or SOFT and have two supportive lobes, one 3 and one 4 inches high. You may choose many different positions with this pillow.