Which method to use for FAS-DPD Testing

I was given link to the Taylor videos, using the FAS-DPD kit, and many of the videos have two ways of doing the test.
Method 1: Use the large tube to fill to 25mL or 44mL (in case of FC), then add appropriate number of drops of reagents
Method 2: Use the large tube to fill to 10mL, then add appropriate number of drops of reagent
Of course, method 2 uses way less reagents.

Is it ok to be using method 2 for all these tests (use 10mL sample size with appropriately smaller reagent levels), as...

Which method to use for FAS-DPD Testing