They're both gonna perform pretty much the same. The exception being LG has a 1ms slower response rate so you could actually see a little more blurring but nothing that noticeable. Any who as for picture color you're probably gonna be disappointed in both choices as they BOTH have TN panel type. TN's have bad color ranges, viewing angles, etc. Their only benefits are the refresh rates but with you going for 1080p 144Hz you're not really getting your money's worth.
Try going for a 1080p 144Hz VA panel. The colors and viewing angles are better than a TN. VA panels are the middle ground from TN to IPS and are known as the common gaming monitor panel.