See my reply to this similar question: https://www.researchgate.net/post/What_is_the_difference_between_a_conference_and_journal_publication

An article is a detailed version of any research that will be reviewed by experts and published in journals for far-extending academic circulation.

https://internationalconferencealerts.com/

On the other hand, a conference paper is often shorter, focused on initial research findings, presenting at academic conferences.

Articles have to cover comprehensive studies but conference papers serve as early research discussions.