So (and whoever “we” is), are these exactly two student GPA’s and test scores? They do not begin to give you sufficient information to draw conclusions.
And many schools use Naviance, which, if the school publishes the school’s scattergrams, provides all of the participating students’ GPA’s and scores. Still doesn’t tell you the entire story. Still. Relying on such data is insufficient, given that there are many more components than two.