I will be having gastric bypass done at the end of this month, but when I was trying to decide between sleeve or bypass, one of the resources I used was this risk calculator. In addition to risks, it lets you select your own co-morbidities such as sleep apnea, hypertension, or diabetes to see how likely it is that they will resolve based on which procedure you choose, and shows you a BMI predictor chart at the 12-month mark. I found it pretty helpful. Additionally, I found this video super informative:
The factors that I considered most were GERD risk and the desire to control my blood sugar and blood pressure, as well as feeling like I could benefit from the threat of dumping if I ate too much fat or sugar, my weaknesses! It definitely took me several weeks to decide as I weighed it all.