The main difference between Dead down Wind and Scent Killer is thatDead down Wind is a line of products specifically designed to mask human scent, while Scent Killer is a general term for any product that eliminates or reduces human scent.
Both products work by using chemicals to break down the molecules in human sweat and skin oils that cause odor. However, Dead down Wind uses more sophisticated technology to create a “scent-safe zone” around the user, while Scent Killer simply reduces the overall strength of human scent.
In terms of effectiveness, both products are very good at what they do. However, Dead down Wind may have a slight edge because its products are designed specifically for masking human scent.