X-Ray evolved into the Xing which evolved into a Duplex mounted G1 22 Mag with the side pockets from the Loco back when Mel was still with Kifaru.
G2 has a meat shelf and a beavertail that wraps to the top, eliminating the top pocket and the side pockets.
My opinion: G1's better, mainly because of the side pockets which easily hold snowshoes or collapse and compress without zippers. This is a GREAT price for this bag...
Great pack for weekend trips with light gear and a possibility of coming out hauling meat.