Is Rainbow Loom or Cra-Z-Loom better?

rainbow loom! with rainbow loom, u can change the columns. crazy-loom's columns are all stuck together, so, yeah!

The Rainbow Loom is better in the sense that it is the original product. But different individuals may prefer a different brand, and to them their own loom is the best. It is a matter of taste, rather than one being better than the other.