If I'm reading it right, the tape is flexible plastic. Those have enough memory that they want to go flat again. If you put them along the length of a cable, they'll unpeel after a while. The only way to make them stay is to use them as flags, which I find messy.

The flexible nylon tape, on the other hand, doesn't have that memory, and once installed, even along the length of the tape, stays and is even hard to remove.