English Adjective Sentence Making (superlative and comparative)

He is smarter than me. He is smarter than me.

He is the cleverest in our class. He is the cleverest in our class.

He is braver than me. He is braver than me.

..... seems to be the same.

He is more diligent than me. He works harder than me.

Stimulation is stimulation, fun is fun.

Honest, upright, kind and friendly.

Being famous means being famous and interesting.

Actually, the sentences are all the same. Only when adjectives or adverbs are polysyllabic, use more or most.