Are Glimepiride & glipizide the same drug?

No, but same class. Both are 2nd generation sulfonylurea drugs for treatment of Type 2 Diabetes. According to a review by the Utah gov't, they conclude: "Overall ranges of HbA1c reduction seen w/glimepiride, glipizide & glyburide treatment in current literature are similar & choice of antidiabetes therapy should be based on individual patient characteristics, including: efficacy, cost, (see below)
No different Drugs. These are two different drugs both used for treatment of Type2 Diabetes.