I ordered the product as an A82 model, the T66 model was delivered, so there is no difference at all...
You can read on the net that it really is just a "re-branding" (some people even claim that there are minimal improvements to the T66 in terms of quality/finish).

The Tomtoc A82 (40 litres) and the Tomtoc T66 have some differences, although they share similar features.

### Main differences:
- Volume and size: Both backpacks have a volume of 40 litres, but the dimensions and weight may vary slightly. The A82 is often designed as a large carry-on, while the T66 may have slightly different dimensions.
- Material and workmanship: Although both are made of high-quality materials, the specific material composition and workmanship details may differ. The A82 is often praised for its sturdy and durable construction.
- Organisational features: Interior features and organisation options may vary. The A82 often has multiple compartments and pockets for better organisation, while the T66 may have a simpler interior.
- Design and colours: The designs and colour choices may differ between the two models. The A82 is available in different colours and styles, which may also apply to the T66, but with different options.

It is not a simple "rebranding", but two different models with specific features and customisations.