The LG model is based on the 6300 and therefore you’d need to quantify just how important gaming is to you. This LG is by far one of the best panels for competitive gaming with a lightning fast input response time (16ms). The trade off being the blacks are inconsistent and the brightness level is quite low. But if you don’t mind that you’d have an edge in blazing fast FPS and Fighting games.
The Samsung may not be as fast but will qualify more as a mixed usage TV. Do try the Sammy 6103 as well
Good luck.