Wedge pillows are designed to raise a portion of the body during sleep, while a cervical pillow is designed to cradle and support the head and neck. Wedge pillows are specifically used to help with acid reflux and snoring, whereas cervical pillows are used to alleviate head and neck pain.Wedge pillows are designed to raise a portion of the body during sleep, while a cervical pillow is designed to cradle and support the head and neck. Wedge pillows are specifically used to help with acid reflux and snoring, whereas cervical pillows are used to alleviate head and neck pain.