This document compares the risks and efficacy of Roux-en-Y (RNY) gastric bypass and Mini-Gastric Bypass (MGB) surgeries. RNY is shown to have higher complication rates, including leaks and re-operation, while MGB presents lower risks and high effectiveness for weight loss and diabetes resolution. The document emphasizes that MGB is simpler, safer, and rarely needs revision compared to RNY.