What is the difference between quality audit and review?

Quality audit means a systematic, independent examination of a quality system. Quality audits are typically performed at defined intervals and ensures that the institution has clearly-defined internal quality monitoring procedures linked to effective action. The checking determines if the quality system complies with applicable regulations or standards The process involves assessing the standard operating procedures (SOP's) for compliance to the regulations, and also assessing the actual process and results against what is stated in the SOP. ( Wikipedia )

Audits and reviews are part of day to day Quality activities and organizations having ISO or CMMI certifications continue to have reviews and audits.