If you want Android OS, DTS support, and table top stand, and Kodi app, get the A80K. G2 is web OS, no DTS, no Kodi and comes with wall mount only.
If you want max gaming support, flush wall mount for gallery like apprarance on wall, and a brighter image, get LG. All 4 ports are HDMI 2.1 ports in G2 while A80K has only 2.