I think the "strong sense of up and down" is mostly just how it was filmed. The camera is held at head height (vs locating cameras in the middle of the module), and the taikonauts are holding their bodies straight and upright, keeping their feet on the floor almost all the time (vs floating and flying).
The ISS does also have a sense of up and down, with lights always located on the ceiling. The ISS even has labels for overhead, deck, port, and starboard.
The ISS does also have a sense of up and down, with lights always located on the ceiling. The ISS even has labels for overhead, deck, port, and starboard.