Not all multiplugs are the same. For normal household use, the requirements for a (standard) multiplug may be minimal.
Besides the colour, the main questions will generally be limited to the number of socket outlets and the equipment variants (switch, USB, etc.).
For trades and industry, things are a lot different. Requirements for ease of operation and robustness are a prerequisite.
In addition, options for installation (screw-on, enclosure mounting, etc.) will make a critical difference, for example.
Special requirements can also play a role, such as for stage technology.
Here the (PROFIversal) multiplugs must be entirely black in order to prevent reflections.
Multiple Socket Outlets STANDARD
Multiple Socket Outlets with specific function
Multiple Socket Outlets without cable