cheiney
Regular
The Mini QJ 4x4 is smaller than the regular Rubik's 4x4. It is 6cm, or the equivalent of an Eastsheen 4x4. It can cut corners, and it breaks in very fast. I would recommend you buy the smaller one, but I have not tried the normal one, so my opinion is rather biased. Nonetheless, I have heard that both cubes are very good.