I need to lose 100+ lbs., and I don't want to take years, or fail at it. Which is the better surgery?

Your logic is OK, but a lot of your facts and info are wrong.

First, to succeed, you'll need to learn to eat real food, enjoyably, like a person who maintains 180 pounds. You'll need to do this regardless of how you drop the excess weight. This is very different than you have been doing. You need to get to the point where this becomes your new normal. You might be able to accomplish this in a very short period of time, a matter of weeks and months, not years. If you do this right, you will feel like you have won the battle in a very short time, and you'll watch the excess weight start to melt off as a result. If you focus on the behavior rather than the body, you'll be on the right track. Read my book to find out what to do. I guarantee that you do not yet know what that is. 

Secondly, if you do this right, it won't take you five years to lose the excess weight. When I got it right, I lost 140 pounds in 18 months, and I've maintained my ideal body weight, within 10 pounds or so, for over 25 years. I've had clients who have had the surgery, and no one has done better than me. If you do what I did, there is no advantage to surgery, and many risks and problems.

It is a mistake to do something unnatural to lose weight, whether it is a kookie weight loss diet you could never live with, an exercise scheme you'd never live with, or surgery. People who do that to lose weight usually gain the weight back, even the ones that have the surgery. They go back to the old normal, never having established a new normal.

In order to keep from gaining weight once you've lost it, you'll need to develop the habits of eating good food that will keep you at 180. Why not do that now, be done with it in short order, and watch your weight go down pretty quickly?  

Your doctor is right with the advice he gave you, more than he probably knows. From what you have revealed in your letter, the surgery would be a mistake for you, perhaps a terrible mistake. It will not produce any faster weight loss than you can produce with the right behavioral approach, would be very risky and potentially harmful. It  will not help you to make the behavioral changes you'll need to make anyway. Surgery could perhaps make it more difficult.

You have done a great job and your thinking sounds like the thinking that can make you a great success in healthy permanent weight loss. You need more and better information. Keep working and write again if I can help.