The difference lies in where the image is digitized
An IP camera converts the image into a digital file directly in the camera itself and sends it as network traffic over an UTP cable to an NVR or switch. An analog HD-type camera, such as HDCVI or TVI, sends a video signal over coax to the recorder, and only then is the image processed and stored. Almost everything you notice later in practice stems from that one difference. Because the image is digitized digitally at the IP level, the camera itself can perform calculations. Think of detection zones, distinguishing between people and vehicles, and multiple streams simultaneously so you can watch live in low quality while recording in full quality continues. In an analog system, that work is done in the recorder. The recorder then determines what the entire system can do, even if you later connect better cameras. This makes the choice less of a matter of image quality alone. With IP, you choose what you need per camera and the system grows with you. With analog, you essentially choose a platform once and stay within the system's lifespan.
