Just for your knowledge :
Huawei provide the chipsets (HISILICON) for Hikvision & Dahua.
And now Huawei enters in the compétition loop with very aggressive prices and a large range of cams, face to n°1&2.
So there is no best or bad cam ; you just got the quality you paid for.
Hik & Dahua are known worldwide as actors in the low range market : domestic.