What is the difference between this product and the other two Sage Smart Grinder Pro? They have different article numbers, and some are linked to a test report, others are not. But they seem to be basically the same, but they all have slightly different weights: - https://www.galaxus.ch/de/s2/product/sage-smart-grinder-pro-kaffeemuehle-11862993?supplier=406802 - https://www.galaxus.ch/de/s2/product/sage-kaffeemuehle-smart-grinder-pro-matt-kaffeemuehle-11872843