The 5Ghz-2 has a higher channels and faster speeds.
My DLink Router didn't have that.
D-Link WiFi 6 Router AX4800 MU-MIMO Voice Control Works with Alexa & Google Assistant, Dual Band Gigabit Gaming Internet Network (DIR-X4860-US)
NETGEAR Nighthawk 8-Stream Tri-Band AX8 WiFi 6 Router (RAX70) – AX6600
My DLink Router didn't have that.
D-Link WiFi 6 Router AX4800 MU-MIMO Voice Control Works with Alexa & Google Assistant, Dual Band Gigabit Gaming Internet Network (DIR-X4860-US)