In the end, OLED screens offer much higher contrast ratios and infinitely dark blacks, with vivid colors that can't be matched by LCD. (android.gadgethacks.com)
The quality of the display itself is magnificent, with very high contrast ratio, meaning deep blacks and bright whites. (windowscentral.com)
The OLED can also achieve higher contrast ratio as compared with other LCD screens in low light environment. (gogi.in)