Getty Images/Zooey Liao/CNET Shopping for a new TV? It can be overwhelming these days, especially with all the models and designations available. With alphabetic features like HDR, 120Hz and HDMI 2.1, it can be hard to keep up with what's new, important or better than what you already have. TVs often include all of those features and more, making it tough to tell the difference. Unlike the rest of those TV tech terms, QLED and OLED are fundamentally different, even though they're only one letter apart. And in our side-by-side comparison revie...