In fact, in terms of image quality, as long as it is a machine with similar price, no matter the size, there is no difference. At this point, size is not important.

But I think it's best to match one big and one small, because:

1, the things taken by the two cameras are better edited and processed in the end. For example, you can add a large camera with a tripod and keep it on with alternating current to ensure uninterrupted sound at the scene.

2, the small camera is more flexible, you can go deep into the crowd, capture some close-ups, and you can also change the high and low positions and bend over.

If you decide to buy only one, I still suggest you buy a big one. Because of the psychological effect of newcomers, you always feel that the style of shoulder-shouldered shoulders is more professional, more dignified and your business will be better.