This statistic alone made me want a bypass vs sleeve because I wanted the most assurance possible to lose the weight and keep it off. Sounds like you share my sentiments. My doc is a sleeve specialist, pushing sleeves vs bypass when medically feasable - and reserving bypass options for the most severe cases. I got the sleeve.
There are some nice potential advantages of the sleeve surgery, namely that you aren't malnurished for life, resulting in having fewer complications as your entire digestive system is completely intact and functioning normally - albiet with a 85% reduction in stomach capacity. You will be able to take regular medicines and absorb critical nutrition better, meaning you will be less likely to struggle with vitamin & mineral deficiencies. You will also be less prone to get immediately sick when eating certain foods, and probably not have a lifetime of reflux/indigestion which can be common with bypass. These are long term benefits that may not be immediately recognized, but it's super nice to not have these issues.
On the weight loss; both the bypass and sleeve are amazing tools that can absolutely help you reach your goals 100%. Remember that no surgery option will fix anything at all; it still requires all the effort from you to change your eating habits and incorporate regular exercise / activity in your every day life. It sounds way more dreary than it is; once you start buying new clothes because your old ones simply fall off and you realize you aren't feeling as much back & hip pain, and have more energy and you are less depressed & anxious because you know you are looking better - you'll want to become more active. It's going to be an amazing transformation.