The MacBook Pro Late 2013 Retina has an 802.11a WiFi standard which is better than most portable PCs that came out more than two years ago. Most laptops that are a similar age to it 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 in fact the worst Wi-Fi standard amongst all MacBooks that have been available for a comparable time to the MacBook Pro Late 2013 Retina.
The best Wi-Fi standard across comparable types of portable PC is 802.11n.