Sorry, I don't know the specific gear difference of Japanese Rubik's Cube Thin smart. However, I can give you some differences between smart and pro.

The main differences between Slim pro and smart Rubik's Cube include:

* * * The launch time is different. * * Slim pro of Rubik's Cube was launched earlier, while Slim smart of Rubik's Cube was launched later.

* * * The weight is different. * * The Rubik's Cube thin pro is heavier and the Rubik's Cube thin smart is lighter.

* * * The types and quantities of airbags are different. * * Rubik's Slim pro uses ordinary airbags, Rubik's Slim smart uses 3D airbags, and Rubik's Slim smart has more airbags than Rubik's Slim pro.

* * * Massage can choose different postures. * * Slim pro of Rubik's Cube can't realize full lying massage, while Slim smart of Rubik's Cube can realize full lying massage.

These are just some differences between Slim pro and smart. For more detailed information, please consult the manufacturer.