As for whether it's better to study for the preparatory course or take the SAT, it depends on the English level. Actually, I personally think it's better to take the SAT. The English of SAT 1 is almost equivalent to the level of CET-46 1 1 (laughs), so the English part is still very difficult, but China's education has always been aimed at exams, so it's no problem for New Oriental to recite words after SAT 1. Besides, as far as I know, there seems to be no preparatory course in America. I think I can only study in America. Of course, this is not to say that other countries are not good, but don't forget that education in China is not too bad. I think if we go to Australia and Canada, we'd better stay at home.
The above is just my personal opinion, I hope it will help you ~ I sincerely wish you a smooth journey to study abroad o(∩_∩)o ...