It makes sense comparing Samsung QN55Q80RAFXZA 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 QN55Q80RAFXZA belongs to the series Q80R, and the LG 49LJ5100 - LJ5100. The Samsung QN55Q80RAFXZA series has 55, 65, 75, 82 inches diagonals, and 49LJ5100 boasts 49 inches diagonals.
The QN55Q80RAFXZA 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 QN55Q80RAFXZA has the VA display, while 49LJ5100 has the IPS display. The LG 49LJ5100 works with 60Hz refresh rate, for Samsung QN55Q80RAFXZA the refresh rate is 120Hz.
The QN55Q80RAFXZA plays sound in surround format, and stereo sound is available on 49LJ5100. The speaker power of the Samsung QN55Q80RAFXZA is 20W, 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 QN55Q80RAFXZA is 122.9/48.4 cm/in, and for the 49LJ5100 it is 110.74/43.59 cm/inches. The height of Samsung QN55Q80RAFXZA is 70.8/27.9 cm/in, LG 49LJ5100 of height 65.8/25.9 cm/inches. A depth QN55Q80RAFXZA is 6.1/2.4 cm/in, the 49LJ5100 has 8.1/3.18 cm/in depth.
The QN55Q80RAFXZA has 4 HDMI connectors versus 2 connectors in the 49LJ5100. As for USB, the QN55Q80RAFXZA has 2 ports, compared with 1 ports for the 49LJ5100. Only the Samsung QN55Q80RAFXZA has the ability to connect to the Internet via WI-FI.
VESA sizes differ and amount to 200 x 200 versus 300 x 300 for the LG 49LJ5100.
You can watch Netflix TV shows and movies on only on the QN55Q80RAFXZA.
As for Smart TV, only Samsung QN55Q80RAFXZA has this feature. Local dimming technology is no available in both models. Voice assistant Amazon Alexa is implemented only on QN55Q80RAFXZA.
The Samsung QN55Q80RAFXZA is better TV in this comparison. Check Samsung QN55Q80RAFXZA price