This test is flawed in so many ways. I just do not understand how the authors do not feel ashamed about what they're trying to sell to readers.
In a healthy environment the author/s presenting study of such quality would've been laughed out the door.
What their results are actually showing is that up to about 18 cores - the actual number of physical cores on a single Intel's CPU they've tested Intel kicks the shit out of Graviton. So if you want proper test to compare that particular Graviton 64 core CPU with the Intel then take system with single socket Intel CPU with 64 real cores as well and then come back with the results.