The LG C9 55SM9X is the better monitor overall, with its large 4K display, HDR10 support, and wide viewing angles. However, the ASUS VG278Q is still a good option for fast-paced gaming due to its high refresh rate and NVIDIA 3D Vision support. The LG C9 55SM9X is the winner in this comparison, with a verdict score of 8.0 compared to the ASUS VG278Q's 6.5 (per RTINGS, Tom's Hardware, CNET, Anand...