[fictivmade]

When reviewing and optimizing BOM costs, Torx screws are almost 2x the cost of a standard Phillips which helps to distinguish knockoffs. Folks who counterfeit items are looking to maximize profit and will always go for the cheapest items and not many people look at screws to see if they're different. Lots of threads out there about this. Even with this said, and as we pointed out, it’s not the main reason Dyson chose Torx screws—the primary reason would have been for proper fastening to ensure a tight assembly that wouldn’t come loose.