Ah yes, went through the same dilemma. In fact I changed my mind the week of surgery, for the exact reasons that you list. That being said, I have heard there are some metabolic benefits to the RNY that the sleeve does not provide, but I am not sure if that is true, and if so, how long those effects last.
I can tell you in the 9 weeks since I was sleeved I have not touched a blood pressure pill. My BP has been perfect. Also, my sugars have been in the normal range ever since surgery. So, with the sleeve I was able to get rid of 2 medications.
As for sleep apnea, I have not had a sleep study done yet, but I was at 400lbs so it will be a bit until I loose enough weight to help with that issue.
Ultimately you have to decide which you are comfortable with. I personally think all things equal the sleeve produces about the same weight loss and with quite a few less risk factors, but then again I chose the sleeve, perhaps someone with RNY has had better results than I have. I'd personally rather lose less weight and not have to worry about the complications that come with RNY.
As an aside you will see a lot of evidence suggesting that GERD becomes a real issue after the sleeve. I had GERD, with pills and chewables each day I still had issues. Since the surgery I have not had a single problem with reflux, but then again I am only 7 weeks out.