The primary difference between canned and jarred sauerkraut lies in their packaging. Canned sauerkraut is typically sealed in metal containers and then sterilized by heat. The canning process involves high temperatures, which affects the texture and flavor. It is often more tender but may have a softer texture than jarred sauerkraut. In contrast, jarred sauerkraut is packed in a brine or its fermentation juices. Glass jars allow for a gentler processing method, which may help the sauerkraut retain its crispness and some of its original flavor.