The Asus G751JY has an 802.11n WiFi standard which is better than most comparable spec laptops that are a similar age to it. Most gaming laptops that have been available for around the same time as it have an 802.11a WiFi standard. This notebook PC also have 802.11ac and 802.11b and 802.11g WiFi standards.
An 802.11n WiFi standard is actually the best Wi-Fi standard amongst all gaming laptops that are a similar age to the G751JY.
The worst Wi-Fi standard amongst similar types of portable PC is 802.11a.