Not all USB-C cables are the same. While they may look similar, there are differences between them.
First, data transfer speeds. USB-C cables can support different data transfer speeds, such as USB 2.0, USB 3.0, USB 3.1, USB 3.2, and Thunderbolt 3 or 4. Higher versions generally provide faster data transfer rates.
Next is power delivery. Some USB-C cables support higher power delivery to charge devices. Each cable may support different wattages, which affects how quickly it can charge a device.
Then there is video output. Not all USB-C cables support video output.
Finally, there is the build quality that everyone mentioned earlier. The materials and construction of USB-C cables may vary, affecting durability and flexibility.
Oh, and there are also some compatibility differences.