There are several differences between Samsung's 4K TV and OLED TV, including color rendition, resolution, image clarity, contrast, brightness, screen uniformity, side angle viewing quality and price. As of 2015, the suggested price for a 55-inch OLED TV is $9,999, while a 55-inch 4K TV costs around $1,800.
One way that Samsung's OLED TV is different from Samsung's 4K TV is in how the television's screen is lit. With an organic light emitting diode, or OLED, television, the panel is self-lit by thousands of OLED cells. The Samsung 4K television still uses liquid crystal display, or LCD, technology where the viewing panel is backlit. The color rendition for the two televisions shows the difference between these two technologies as the OLED television has a much richer, more realistic color than the 4K. This also gives the OLED the upper hand with contrast. Additionally, because each pixel cell is lit individually, the picture has a more uniform appearance and a better side angle view.
However, in resolution the 4K has the OLED beat. The 4K has a resolution of 3840 by 2160 pixels, while the OLED has the standard resolution of 1920 by 1080.
Another difference between the two televisions is that the OLED TV is two televisions in one. This means that two separate users may enjoy watching different programs using the same television while enjoying all the benefits the television has to offer.