The aim of the study is to compare the relative clinical outcomes between advanced medical therapy alone or advanced medical therapy combined with bariatric surgery [either Roux-en-Y gastric bypass (RYGBP) or laparoscopic sleeve gastrectomy] in patients with type 2 diabetes and a body mass index (BMI) between 27 and 43 kg/m2. The study will examine the short and long term effects of each intervention on biochemical resolution of diabetes, diabetic complications, and end-organ damage.