The MacBook Pro Late 2013 Retina has an 802.11a WiFi standard which is better than most comparable spec notebook PCs that are a similar age to it. Most laptops of this age and spec have an 802.11n WiFi standard. In addition, this notebook PC have 802.11ac and 802.11b and 802.11g WiFi standards.
An 802.11a WiFi standard is actually the worst Wi-Fi standard amongst all portable PCs that have been around for more than two years.
The best Wi-Fi standard across comparable types of notebook PC is 802.11n.