You know those perfumes that have the same name as a previous release, but with an evocative word or two added in (Chanel Coco vs. Coco Mademoiselle, Britney Spears Fantasy vs. Hidden Fantasy, etc.)? Those are flankers. They're fragrances based on a successful formulation, but with a new note or two added in (hence that interesting verbiage tacked on to the end). Flankers are usually a way for manufacturers to double down on a scent's success, since fans of the first version will usually also be interested in the retread. Some flankers are better and more elegantly reformulated than others, but if you've got a scent you can't live without and a flanker version gets released, you might want to check it out since it's sure to share many of the original's characteristics.