The difference between the tomtoc travel backpack 40l and the tomtoc Navigator-T66 40l lies primarily in the design and features: The Navigator-T66 offers an adjustable capacity of 38 to 40 litres, is specially designed as a laptop backpack with several compartments for laptops, tablets and travel items and can also be used as a duffel bag. It has two laptop compartments, padded back and shoulder straps and a chest strap, but no hip belt. It is also made from robust, water-repellent material and has an urban, minimalist design.

The general tomtoc travel backpack 40l is less specifically described, but the Navigator-T66 is clearly aimed at technology travellers with a particular focus on organisation and protection of electronic devices. The flexible compression and TSA-friendly design are other features of the Navigator-T66 that set it apart from a standard travel backpack.