I chose the band because RYN scared me! I did not want my insides cut up and re-arranged. If something goes wrong, or you regain your weight you are stuck that way. I know a few people who get the band AFTER RYN because they have regained weight.
I also liked the band because it can be removed if something goes wrong, or if I get pregnant I can remove Fluid instead of stretching out my stomach, and there is no malabsorbtion. I am fine with having to eat right because I need to do that anyway to stay successful for life. Of course, there are complications and they aren't always fun (errosion, band slippage, ulcers, etc) but they aren't all as serious as RNY complications.
I also like that the band is adjustable. If I have not met my goal but I am at a plateau for a long time, or I feel I have lost restriction, I can get a fill!
I can't tell you which is better because everyone has their preference, but that is why I preferred the band to RNY.(I also agree with everything Dawn said above! She is also right.)