Testing with 1.1.1.1, 4.2.2.2, 8.8.8.8, 9.9.9.9, and my isps resolvers, they all returned different nodes in the Akamai network. Therefore, it could help if there is high load on one's path.
50Mbps seems to be an application limitation. I can get "test internet" page to show over 100, but...