The Kilominx is the smaller version of the Megaminx, missing edge and middle pieces just like the regular 2x2. The version produced by Meffert's is called the Flowerminx as the cuts resemble a flower.
There are three cut variations. First, the flower cut produced by Meffert's. Second, ShengShou's version pictured to the right. Third, a cut
The Master Kilominx is like a 4x4 Megaminx. It has been produced by MF8 (pictured to the left) and ShengShou (which looks like that brand's normal kilominx).
Its only smaller brother is the Hectominx.