One key difference between DIN and IFI self-drilling screws is the measurement system used to define their size. DIN screws are typically measured in metric units, while IFI screws are measured in inches. Additionally, there may be differences in the specific design and performance characteristics of DIN and IFI self-drilling screws due to the different standards and testing procedures used to evaluate their performance.
Ultimately, the choice between DIN and IFI self-drilling screws may depend on the specific application, local regulations, and availability of each type of screw. It is important to carefully review the specifications of each screw and ensure that it is appropriate for the intended use.