You can't tell the difference between a leather chair and a PU chair. Of course, you can also make a rough distinction only from the price. What is expensive is genuine leather, and what is cheap is PU. In fact, PU is not as good as fiber fabric, as long as the structure is reasonable and more comfortable.
As for the leather chair, the boss's swivel chair is still very comfortable, but it will take up a lot of space. You should think it over before you start.