I researched until I couldn't read any more. Also spoke with a gal who works for my husband who had the sleeve. I think generally speaking they have about the same outcome as far as weight loss goes. The sleeve once you are done that's it. There are certainly less follow ups. I chose the band because I ultimately decided I wanted the control over how quickly I lose, and I can get a fill here in town. It was an all inclusive package so I get all my fill appt.s for the first year at no additional cost. I also liked the fact the band doesn't affect your nutritional intake.
I have been banded just over a month, the downside I see is you eat something that doesn't want to go down, up it comes. It's happened twice to me, I'm not sick or anything I just urp it back up. If you have to travel any distance to get a fill, I would highly consider the sleeve. People won't drive to keep the fills up and it's important.
Good luck in your decision, whatever your decision will be right for you.