I have heard that AGS is often 1 grade stricter on clarity than GIA. Is this true? If so, is it likely that a VS2 by AGS standards will score a VS1 by GIA. What about color?
As far as my current experience goes with both institutions, AGS is definitely stricter on colour, while I see little difference in the clarity-grading.
This small difference in colour is a minor difference, and will only be noticed on borderline-stones. Nothing to worry about.
Both are reputable labs, and the small difference should not be exaggerated.