What's the difference between Qualified Internal Auditor and Certified Internal Auditor?

As per my experiance of 5 years as an Internal auditor. I would like to say that above mentioned two terms are related on the basis of educational qualification. Internal Auditor is above this, i agree these qualifications are reqiured to get into this profession with good position at start, but later on its depends on our intellactual knowledge,approach and analysis.