Detailed subject analysis: Scopus vs IEEE
Scopus vs IEEE is not just a definition comparison. Researchers need to decide which route fits their document, institution, career requirement and publication timeline.
IEEE is a publisher and professional venue family; many IEEE publications may be indexed in databases such as Scopus depending on the venue.
The comparison should be judged through database coverage versus publisher/venue family, quality expectations, cost/time implications, indexing evidence and manuscript maturity.