USB-A and USB-C chargers are different in 2 main ways.
Design: USB-A features pin connectors and has a thin, rectangular cross-section, and can only be connected in one direction. USB-C, on the other hand, has an oblong-shaped plug that is smaller, more rounded, symmetrical, and can be inserted in any direction.
Performance: The USB-C standard is a big improvement on USB-A, which enables higher power capacity and much faster data transfer, which is why it is preferred by most major phone brands.