It makes sense comparing Samsung UN55KS9000 vs LG 49LJ5100 because they both are able to give some premium features. The biggest difference between TVs is screen size, namely 55 and 49 inches respectively. The UN55KS9000 belongs to the series KS9000, and the LG 49LJ5100 - LJ5100. The Samsung UN55KS9000 series has 55, 65, 75 inches diagonals, and 49LJ5100 boasts 49 inches diagonals.
The UN55KS9000 is capable of playing video in 4K/UHD resolution, which can't be said for 49LJ5100. Each of the compared devices supports Full HD resolution. The UN55KS9000 has the SVA display, while 49LJ5100 has the IPS display. The LG 49LJ5100 works with 60Hz refresh rate, for Samsung UN55KS9000 the refresh rate is 120Hz.
The UN55KS9000 plays sound in quadro format, and stereo sound is available on 49LJ5100. The speaker power of the Samsung UN55KS9000 is 40W, versus 10W of the LG 49LJ5100. Dolby Atmos multi-channel audio format is not supported by both of the tested models.
The width of the UN55KS9000 is 122.94/48.4 cm/in, and for the 49LJ5100 it is 110.74/43.59 cm/inches. The height of Samsung UN55KS9000 is 71.12/28 cm/in, LG 49LJ5100 of height 65.8/25.9 cm/inches. A depth UN55KS9000 is 3.81/1.5 cm/in, the 49LJ5100 has 8.1/3.18 cm/in depth.
The UN55KS9000 has 4 HDMI connectors versus 2 connectors in the 49LJ5100. As for USB, the UN55KS9000 has 3 ports, compared with 1 ports for the 49LJ5100. Only the Samsung UN55KS9000 has the ability to connect to the Internet via WI-FI.
VESA sizes differ and amount to 400 x 400 versus 300 x 300 for the LG 49LJ5100.
You can watch Netflix TV shows and movies on only on the UN55KS9000.
As for Smart TV, only Samsung UN55KS9000 has this feature. The UN55KS9000 has Local Dimming technology. Voice control is not available for these models.
The Samsung UN55KS9000 is better TV in this comparison. Check Samsung UN55KS9000 price