The new Fire TV Cube is clearly improved - it's not just a slightly tweaked model, as was the last upgrade. There's also a fair bit going on at the rear of the latest device. While the 2nd gen Cube had a simple HDMI output and Micro-USB port which could be used with an Ethernet adapter, the 3rd gen model has its own Ethernet port built-in. Fire TV Cube (3rd gen): Octa-core processor (4x 2.2Ghz, 4x2.0GHz), 2GB RAM, 16GB storage, tri-band Wi-Fi 6E (802.11ax), Bluetooth 5.2 + LE

There's also better connectivity, with Wi-Fi 6E support for greater stability and speed, plus a later version of Bluetooth that offers more bandwidth.The main visible difference though is that its circumference is now covered in fabric, making it look more like an Echo speaker than before. This is said to improve the audio quality when using Alexa and playing music through the device.