Fashion is about dressing according to what's fashionable. Style is more about being yourself.
Oscar de la Renta
For me, style is essentially doing things well. If you want to be outrageous, be outrageous with style. If you want to be restrained, be restrained with style. One can't specifically define style. It's like the perfume to a flower. It's a quality you can't analyze.
Fashion fades, only style remains the same.