The Picture of Dorian Gray and American Psycho

I’m currently writing a 2,500 word esssy comparing the loss of morality in American Psycho by Bret Easton Ellis and The Picture of Dorian Gray by Oscar Wilde.

There are some really strong parallels between the novels: hyper fixation on beauty, hedonism, aestheticism, decadence, narcissism, psychopathy and murder. Aside from these themes, a more specific similarity is Bateman and Dorian's use of their social class as a veil to conceal their wrongdoings. There are also similarities between the authors' personal lives, as well as the responses to the novels when they were published.

Are there any other similarities or differences between these novels that stand out to you?