The Picture of Dorian Gray     vs         Dr Jekyll and Mr Hyde

COMMON IDEAS

There's always a dark side in every human being

Good and Evil are two different aspects of the same personality

They both criticize the Victorian society and its emphasis 

on respectability and outward appearance

There's a SPLIT between the world of appearances and the inner world

There's a real contrast between good and evil, true and false, moral and immoral

Dorian looks   wonderfully young and pure                                    

⬇

1. The irregular, shameful and criminal habits do not change Dorian's physical appearance
2. The picture reflects Dorian's evil soul (a symbol of his conscience)
3. Dorian is fascinated by his own image but feels disgust when contemplating the transformation of the picture

Dr Jekyll is a respectable doctor, who has a very good reputation

    ⬇

1. The transformation gives Hyde/Jekyll the possibility to follow bad instincts and do evil things without spoiling Jekyll's reputation, because it is Hyde who acts
2. The mirror  reflects the evil side of Jekyll's nature
3. Jekyll likes his other self but feels remorse for the murder