Understanding and application

Which contrast between inna Allāha and innamā shifāʾu is correct?

Support for the Religion, Restriction, and the Rules of innamā (Hadith 110-114)

• Both invariably make the next noun accusative
• The first is imperative and the second past tense
• Inna governs an accusative noun in the first; mā kāffah blocks that effect in the second
• Both merely introduce a question