To compare the details of the different surgeries, a good resource is the WLS Wiki - which was created by WLS patients representing their own respective surgeries and based on medical journal information available from reputable organizations such as the ASMBS. Here's a comparison chart that explains the details of each. Take the time to explore the rest of the website for more detailed information.
Or download a printable version of the above chart. Print on 11x17 paper.
Comparison of WLS Currently in Use.
(Wait a moment after clicking the link - the file will download and give you the option to open/view.)
RNY - Roux-en-Y Gastric Bypass
Adjustable Gastric Band