Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
I bought two dresses. The gray “advanced” and afterward, the leopard brown. I like both, but the fabric on the gray does seem to be a thicker quality (both are polyester) and it is also about 3/4”-1” longer. This is probably enough that I migh wear the leopard with leggings beneath