Manufacturers often want one project to cover several model numbers. Whether this is appropriate depends on the technical differences among the models and whether those differences can affect compliance.
A model-difference table should identify changes in PCB layout, radio module, antenna, enclosure, display, clock speed, power supply, ports, cables, battery, firmware, and optional functions. Cosmetic changes and branding differences are generally easier to justify than changes affecting emissions or RF performance.
The laboratory and certification body may select a worst-case representative model and request additional spot checks for variants. If the differences are significant, separate testing or separate authorizations may be required.
The family strategy should be agreed before testing and should match the final model list used in reports, manuals, labels, and sales materials.
APEX CS practical takeaway: Confirm the product-specific regulatory pathway before production, testing, labeling, or shipment. Requirements vary by device design, intended use, claims, market channel, and final configuration.