The CDS data is more recent and - under normal circumstances - would be a better predictor of grades and standardized test scores than Naviance, but of course 2020-21 was not a normal admissions year. As you mention, some of the Naviance data is outdated. Some high schools have 10 years worth of data on Naviance. You should be able to see the number of students admitted from your school (though not their stats) on Naviance, broken down by year of admission. This is valuable to see if your school is trending up or down (or holding steady) in the number of students admitted to a particular college each year. Good luck!