This format is used for data exchange in programs that work with vector graphics from Corel, and also for printing completed designs. It contains image data and also the metadata that describes it. In CMX it’s possible to store layers that can be independently edited. The format is recognized by Adobe Illustrator versions 6-8.
PSD is a file format that is created with Adobe Photoshop. This adobe proprietary file can contain layers, vector images, raster images, text etc. It also supports Gray, CMYK, and RGB etc color coding format. It can contain large amount of data in layers.