A webbing-only construction gives the harness a small pack size and allows it to dry quickly.
An extra clip on the leg loops provides a fix point for the Ice-Screws and prevents swinging while e.g. skiing.
The Diaper-Style allows you to put on the harness on through the legs even with pants on.
Hip belt and leg loops have different colors, also on the in and outside to ease putting on the harness.
A buckleless waistbelt utilizes the extension of the leg loops as double tie in loops.