From Quora: My Answer to "Is it true that the SAT is easier in the US and much more difficult in Asian countries?"
No. The tests are the same difficulty, and there’s been at least one case where an SAT given in the US was identical to an earlier Asian version. That caused an outcry, since the few students who’d taken the Asian SAT had an unfair advantage on the US SAT.
But see Aatithya Vora’s discussion of SAT percentiles, also posted as an answer to your question.
Author: John Linneball Who did you think? ;-)
I'm the proprietor and only tutor for this business; that's why I named it after me.