The update is based on Android 7.0 Nougat so there will be no change/update in the operating system or EMUI version.
Honor 6X update is only 163 MB in size and can be downloaded using the data pack. If the update reaches your device then you must install it. Don’t neglect it because it comes with a security patch which sometimes fixes serious vulnerabilities.
The Honor 6X August update will be rolling out via OTA so it might take several days to arrive for every device. In the meantime, you can manually by going to your phone’s Settings > About phone > System update.