X06 and X04 are the same but they are nice quality. Really impressed!
I have another one of this exact brush, it's perfect for highlighing and also contouring, infact I bought another one to separate each brush for one single use (and color). The packet arrived in 3 weeks to Italy, this is the fastest package ever seen in the aliexpress history. I'm really happy. The brush arrives in a classic pluriball packet, inside you have his nice black box, and the hair are protected by this elastic net, very useful to use on travel. The brush is super soft and the hair seems to be really from animal (I have other brushes also from zoeva and real techniques and I'm able to recognise the type of hair used)