The method of use for the physio balls is similar to the spiky balls. They are a little smaller and firmer (6.3cm in size) than the spiky ball and used for targeting different areas of the body. They provide more pressure, and can be considered to be more focused then the spiky ball. In general the massage ball can be an alternative to the spiky ball and it can come down to personal preference. If you buy this item and decide that it is not for you let us know and we will do you a deal on the spiky ball.