I think it's different, and noteworthy, for two reasons:

1. Everyone who's participating in this program paid $100 extra to do so, encouraged in part by the representation that they wouldn't have to remove their shoes.

2. The technology here was specifically designed to screen footwear while it's on the wearer's foot, but fails to do so in an alarmingly high percentage of cases. The WTMD isn't specifically designed to screen any particular item; it finds metal, above a certain threshold, regardless of what or where.