It makes it tougher and more durable for the hunters with the rubber armour and the one big advantage is the GA version has bigger diameter eye cups than the W version, so they don't sink into your eye sockets as bad causing black-outs. You can get the bigger diameter green eye cups for the GA from Swarovski and put them on the W version, but then you have green eye cups on a black binocular, which really doesn't look right. You have to remember the Habichts especially the GA version were designed to be a lightweight, bright very tough hunting binocular for the mountains in Austria. The Habichts with their tight focusers were really not designed for birding where you have to focus a lot. A hunter usually leaves the focus at infinity and glasses large areas looking for game, and they don't want the focus to change. The older model Habichts had a yellowish tint that might have improved contrast. The NL and EL are really Swarovski's top birding binoculars.Forgive me for a personal observation. Why a rubber 8 x 30 Habicht.… why would you take a perfectly elegant, beautifully crafted fully waterproof binocular then add a bunch of weight and a whole bunch ugly to it. Why?