What distinguishes representative metaphor from explicit simile?

Taʿrīḍ, Talwīḥ, Ramz, Īmāʾ and Ishārah; the Rhetorical Force of Figurative Speech

• Simile never involves a shared quality
• Transferring a whole scene versus stating an overt comparison
• One always has one word and the other a particle
• Representative metaphor never needs context