Amazon says reviews should no longer be shared across variations when the differences are significant enough to affect functionality or the customer experience. In a later Seller Forums reply, Amazon also clarified that flavor, ingredients, and formulation differences belong in that more significant category.
What is Amazon’s main rule?
In the original announcement, Amazon says review sharing will continue only when variation differences are minor and do not affect functionality.
By implication, differences that change how the product is used, evaluated, or experienced are the ones most likely to fall outside shared-review treatment.
What concrete examples has Amazon given?
Amazon’s announcement lists the kinds of minor differences it considers eligible for continued sharing, such as color, pattern, pack quantity, some size changes, secondary scents for non-scent-focused products, and model fitments.
The Ana_Amazon reply adds a seller-facing example on the other side of the line: flavor, ingredients, and formulation.
Why is this distinction important?
The distinction changes how star ratings and review counts may appear at the variation level.
Amazon is effectively saying that if products are too different from one another in a customer’s eyes, the review system should become more product-specific rather than stay pooled across the family.