The toothless FDA allows for a 20% margin of error on nutrition facts labeling, so it could possibly be one or the other or both.
Some products may just have variation. Some foods will be maliciously mislabeled with 19% less calories/sugar/fat but may have little to no variation within the same product.
Some products may just have variation. Some foods will be maliciously mislabeled with 19% less calories/sugar/fat but may have little to no variation within the same product.