<p>Well the SAT IIs are more precise indicators of ability in a particular subject. For example, I got a 5 on my AP Chem test. I don’t know what the curve on the test was, but say the lowest score you could get and receive a 5 was a 70% of the maximum points. If you were to look at several applicants with 5s on the test, you wouldn’t know whether the person got 70% of the points or 100% of the points. With the SAT II, however, you can look at a score and know with certainty how well someone did. This is probably just one of the reasons colleges prefer the SAT II over the AP test for admissions.</p>