Which distinction between tawshīʿ and specific-after-general is correct?

Iṭnāb: Clarification after Ambiguity, Tawshīʿ, Repetition and Īghāl

• Tawshīʿ highlights a class member while the other explains a dual
• Both require specific before general
• Both must occur at the end of a poetic line
• Tawshīʿ names two initially unnamed items; specific-after-general highlights one member