Consider a conference publishing papers related to any EC/CS engineering field. What is the exact difference between different types of papers published in such a conference, i.e., main conference paper, mini-conference paper and workshop paper? Is it inferior to have one's work published in a mini-conference or workshop as opposed to a full conference? Are there any other such sessions within usual conferences for these areas?
Miniconferences and workshops are usually considered to be satellite events to a main conference. Often, these are on specialized topics, and often what starts as a workshop becomes a spin off conference of its own.
So it's tricky to say that it's inferior, but depending on the workshop/miniconference it might certainly be more specialized.