Actually, these two network devices are more like cousins than twins.
Unlike the previous situation, network managers can add additional APs as the demand grows, in order to cover a more extensive physical area.
Usually, the wireless router can offer Wi-Fi signals for devices directly, or connect to a which can add wireless APs to extend the Wi-Fi coverage.
Instead, a wireless access point can be added in locations that have bad network conditions, eliminating dead spots and extending the wireless network.
A wireless router refers to a network device that performs the functions of a router by connecting WiFi-enabled devices, like laptops, smartphones, tablets, and such wirelessly.
Besides, they also have firewalls and password protection functionality for defending against the potential threats outside of the LAN.