Amazon sells two different kinds of standalone Fire TV streaming devices: Fire TV sticks and the Fire TV Cube. They can pretty much do all the same things and stream the same channels, but the Cube is slightly more powerful. The Fire TV Cube is Amazon's top-tier streaming device. This means that it'll load apps faster and stream in the highest quality (4K UHD). It also comes with an ethernet adapter you can use to connect the Cube to the internet, which is leagues faster than using Wi-Fi. But while the Cube is powerful, it might not be worth the higher price. If you don't have a nearby ethernet outlet, the Cube's ethernet feature won't mean much. And if all you care about is streaming in 4K, the Amazon Fire TV Stick 4K Max will suit you just fine for almost half the price.