Which distinction separates a transitory from a confirmatory ḥāl?

Appendix to Faṣl and Waṣl: Circumstantial Clauses, Wāw and Pronominal Linkage

• One is always definite, the other indefinite
• One is prose, the other poetic
• One describes a temporary state; the other may reinforce an established assertion
• They never differ in purpose