This is a difficult question to answer and it really depends on your own individual needs and situation. There are plenty of similarities between coccyx cushions and donut pillows, but there are also some big differences too. Essentially, a coccyx cushion is specifically designed with that cut-out shape to provide relief to the tailbone, and a donut pillow is designed differently. Both can provide a lot of relief for those with back pain, and you might want to try both to see which one works best for you.