A collection uses athar for both a Companion's own saying and a Successor's own saying. Which conclusion is correct?

Athar: Its Use for Mawqūf, Maqṭūʿ and Hadith

• Both can be called athar, while their attributions remain distinct.
• The shared name makes both reports mawqūf.
• Calling both athar also establishes the acceptance of both.