The Vin Cube 4x4 is a new 4x4 from a new brand, designed by a former world record holder, Haixu Zhang (张海旭), it has some significant similarities to the MGC but just feels slightly different and I suspect most people will consider it to be slightly better. It has good corner cutting and a fast fluid feel with some slight stability, reminiscent of the X-Man Ambition. It feels a bit like a cross between an MGC and an X-Man Ambition but significantly closer to the MGC. It is available in two options: The regular glossy option which is slightly more glossy than the MGC, and the UV coated version, UV coating is a process where a thin coating is added to the cube to make the surface of the cube feel smoother and more scratch resistant.
The glossy version is available here
The UV coated version is here