Now, this is primarily a question of image quality. As we’ve mentioned above — if you have a higher-resolution camera, you will get clearer and more usable security footage; with more vivid details. With that in mind, a 4K camera is better — it is bound to give you clearer and sharper images compared to a 5MP security camera. If you’re handling trespassers who were using a car, your camera might have captured their car’s license plate numbers. However, the image quality of your camera will determine if the full plate number can be read from the footage. Depending on the distance, a 5MP camera will still probably provide you with a shot that’s good enough to yield actionable information; but 4K is a surer bet in this regard.