1.1. Jimmy's voice is more beautiful than Johnny. (AS)

→ Johnny's voice is not as beautiful as Jimmy.

2.2. The plots of the film are not the same as those of the novel. (FROM) 

→ The plots of the film are different from those of the novel.

3.3. Kien's presentation was clearer than Mai's. (NOT) 

→  Mai's presentation wasn't as clear as Kien's presentation

4.4. Mark's music project is different from mine. (LIKE)

→  Mark's music project is not like mine.

5.5. Pop music attracts more listeners than rock music. (AS)

→ Rock music does not attract as many listeners as pop music.