Sackler, and to a lesser extent the other Israeli schools, are in a different class when compared to most other off-shore schools. To understand why, I have to give you some history
Beginning in the late 1960s, urban decay, drugs, crime, etc was ravaging the inner cities, prompting "white flight", including much of the medical community. New York City was hit especially hard as it had (and still has) the largest municipal hospital system in the world. While Nelson Rockefeller, one of the grandsons of the oil tycoon John D. Rockefeller, was Governor of New York he built up the SUNY system including the medical schools. But it still wasnt enough. Trying to recruit doctors from oversea "legitimate" medical schools wasnt enough. So the the influential Jewish medical community helped get a law passed in 1981 that allowed the NYS office of professions to approve and register overseas schools essentially making them as if they were in the state. Sackler was one of the first. This was also before all residencies where part of the Match (which didnt become complete until circa 2005). This approval allowed complete freedom for these schools to run most if not all clinical rotations in New York. (As an aside, this doctor shortage and limited spots in medical schools also prompted the beginning of the Caribbean medical school phenomenon with the founding of St. George's. Also, because of Nelson Rockefeller's bad back and use of an Osteopath, it was the beginning of DO's getting full physician and hospital privileges) . So many of these students where highly qualified but couldnt get a very limited medical school spot in the states. In 1980 or so, the acceptance ratio was nearly 4:1. About 28% of applicants got accepted
Sackler, unlike the later Caribbean schools, is a legitimate university, from a country with high "western" standards of medicine following the British model, with a limited class size (now 43) and was not intended as a profit making venture. It was also seen as a place where Jewish students could get a spot in medical school without discrimination. The Ivies especially, with the "blue blood" culture had set quotas on Jews thru the 1960 and early 1970's. This latter was formally dropped only to be replaced by a series of agreements between Ivy UGs and med schools basically guaranteeing seats. Even more so some schools purposely had a Saturday morning seminar to keep religious Jews out. All this led to Sackler and the big "3/4" Caribbean schools to have most clinicals in New York, having students network, and having placement into residencies (prior to NRMP as we know it today.). At one point in 1980s-1990s something like 1/3 of all doctors did some of their medical training (either medical school, residency, or fellowship) in NYC. I would venture say a sizable number of religious jews (both Hasidic and Orthodox) use Einstein and Sackler as their top choices. Perhaps 1/3 or more a Sackler class is this group.
This went on until 1990 when their was a shift in undergraduates. Prior to this medicine was a big goal for students. But with rise of PC and computers as well high level finance and business, many students who would have been premeds now shifted. This was also when HMOs and doctor's liability insurance when making the profession less attractive. So acceptance rates dropped from nearly 4:1 in 1996 to 2:1 by 2003. Along with this drop the quality of applicants dropped and was the beginning of the Caribbean real corporate business profit model. with huge class sizes and taking any warm bodies they can find. Since Sackler did not go this route, its reputation has stayed solid. And again, it is different than off shore schools in that 1) legitimate university; 2) follows a strong western medicine standard overseen by a "real" government; 3) its class size 63) is small ; 4) it is competitive to get a slot; 5) it has attrition rates as good if not better than most US schools ; 6) So virtually everyone who starts earns a degree and gets a residency slot. These slots are reported and I would say the graduates are competitive.
So in education and reputation, Sackler is much more like a US school
Overview of History/Law in NYS
http://www.iaomc.org/nyef.htm
AAMC applicant pool chart
https://www.aamc.org/download/153708/data/