I was also deciding between Sackler and Ben Gurion. They're both great schools with building reputations in the USA. Sackler's reputation is more established and everyone secures an average to above-average residency in the States. Ben Gurion's program in International Health is extremely appealing if you're interested in cultural concerns and social awareness in medicine. Also, Ben Gurion's affiliation with Columbia is extremely helpful when applying for residencies. It's very hard to compare both schools because one is geared towards practicing traditional/modern medicine in the States (and a USMLE/traditional medical school based curriculum) while the other school includes the medical curriculum (system-based) with additional courses in international health subjects (refugee relief, pediatrics in Africa, Health Care in under-developed countries, etc) and attracts people who are GENUINELY interested in these subjects.
I visited both schools in Israel during the application process before I was accepted to either school. The students at Ben Gurion are EXTREMELY warm and the administration is even more welcoming. I met with the head of a few departments (some professors come to teach class straight from the wards) and they all seemed extremely well trained, modern physicians. BGU is a hospital-based medical school. You'll run into Bedouins, Muslims, Jews, Christians, etc. as you walk through the hospital to get to class. It's truly a multi-cultural experience. But again, it's honestly made for people who are actually GENUINELY interested in studying these subjects while taking the very demanding course load of medical school.
Sackler is a traditional medical school in the sense that the curriculum is geared towards the USMLE and structured similar to medical schools in the States. Sackler doesn't waste time on anything that's not anatomy, histology, biochemistry, etc. Sackler is a school that you choose if you wanted to go to school in the States but, for whatever reason, chose to come to Israel. Ben Gurion is a school that you choose if you'd consider going to an international health school in the States. In other words, ask yourself: "If I were to go to school in the States, would I choose a school that has a Sackler-type curriculum or a Ben Gurion-type curriculum?"
In the end, I chose Sackler. I spent months deciding between both schools, but ultimatly it came down to the question above. If I would have chosen to go to school in the States, I would have chosen a school like Sackler. The international health extra curriculum of Ben Gurion sounded fascinating to me and the fact is I probably would have enjoyed it had I gone. But in the end, you have to understand that medical school is going to be intense. My plan is to return to the States to practice, so I decided to devote all my energy to the traditional-style curriculum that will give me the education of any traditional medical school in the States in order to do my best on the USMLE.
Any more questions, feel free to email. I know what you're going through and the best thing to do is to talk to as many people as possible from both sides and then ultimately ask yourself the question above.