Decorous vs Stylish - What's the difference?

As adjectives the difference between decorous and stylish

is that decorous is marked by proper behavior while stylish is having elegance or taste or refinement in manners or dress.

(en adjective)

Marked by proper behavior. (rfex)

* 1919 ,

But who can fathom the subtleties of the human heart? Certainly not those who expect from it only decorous sentiments and normal emotions.

(en adjective)

Having elegance or taste or refinement in manners or dress

(film) Having a particular directing style or cinematography.