All 4 Uses of

contrast
in
The Brothers Karamazov

In that respect he was a striking contrast to his elder brother Ivan, who struggled with poverty for his first two years in the university, maintained himself by his own efforts, and had from childhood been bitterly conscious of living at the expense of his benefactor.
Chpt 1 *

contrast = something notably different

The other, younger Pole, who was staring insolently and defiantly at the company and listening to the conversation with silent contempt, still only impressed Mitya by his great height, which was in striking contrast to the Pole on the sofa.†
Chpt 8

contrast = notable difference

Yes, such natures—oh, let me speak in defense of such natures, so often and so cruelly misunderstood—these natures often thirst for tenderness, goodness, and justice, as it were, in contrast to themselves, their unruliness, their ferocity—they thirst for it unconsciously.†
Chpt 12 *

in contrast = in a comparison that shows differences

Dmitri's enthusiastic references to Ivan were the more striking in Alyosha's eyes since Dmitri was, compared with Ivan, almost uneducated, and the two brothers were such a contrast in personality and character that it would be difficult to find two men more unlike.†
Chpt 1

Definitions:

(1) (contrast as in: contrast their writing styles)
point to differences between; or compare to show differences
(2) (contrast as in: there is a contrast)
a difference -- especially a notable difference; or the side-x-side arrangement of things that draws attention to an unmissable difference
(3) (contrast as in: sharpen the picture contrast)
the difference between tones of an image -- as in a photo or video -- such as the quality of brightness or the intensity of shades or colors