The Geara Zulu's raw specifications are overall better than its predecessor, the AMS-119 Geara Doga. The Geara Zulu appears to have a notably smaller load out compared to the Geara Doga. In UC 0096, the Geara Zulu is the front line mobile suit of "The Sleeves", being their most advanced mass production mobile suit. Like most of the mobile suits operated by The Sleeves the Geara Zulu featured distinctive markings, most notably on the chest and wrists. The Geara Zulu also appeared to be more similar to the Zaku II than the Geara Doga. The Geara Zulu also featured many variations.

Although an efficient mobile suit, the Geara Zulu is outperformed by the RGZ-95 ReZEL mobile suits used by Londo Bell in UC 0096.

Info from gundam wiki