Wi-Fi 6 (802.11ax) is the prior generation Wi-Fi, with up to 9.6 Gbps theoretical and OFDMA for efficient multi-device handling. Wi-Fi 6E added the 6 GHz band for less interference.
Wi-Fi 6 vs Wi-Fi 5 (802.11ac) improvements: OFDMA: simultaneous data to multiple devices (Wi-Fi 5 was single-target). Target Wake Time: IoT devices sleep longer, save battery. WPA3 security: replaces WPA2. 160 MHz channels.
Wi-Fi 6E adds the 6 GHz band — uncongested in most environments, supports faster speeds. Requires Wi-Fi 6E router AND Wi-Fi 6E client device.
For most homes today, Wi-Fi 6 is the practical sweet spot. Wi-Fi 6E benefits heavy users in dense apartment buildings. Wi-Fi 7 is overkill until ISP speeds catch up.