From the Newman Tools website:

Get The Wiha TORX Advantage.

TORX requires no insertion pressure for driving and no cam out forces are generated.
TORX has axial power transmission areas, Tools don't slip. Reduces possibility of distorted screws.
Wiha TORX has 6 large torque transmission surface areas that allow for higher sustained torque forces.
Wiha TORX has 15 degree efficient drive angle Tools and screws won't become distorted. better screw to tool contact.
Wiha TORX profile is precision machined for an exact fit and long tool life.
Smooth rounded edged reduces possibility of damage to parts or assemblies