Comparisons are made all the time all over sports so stop trying to act intelligent. Mary Cain could definitely run this year 2:02 800m, 4:39 mile, and at least 9:56 3200m in paced runs or if she had concentrated on any one event.
Have a freshman distance runner ever won Gatorade Athlete of the Year?
"could" in your mind, but she hasn't.
Let the girl show us what she's got without so much speculation. She's run a HANDFUL of races this year.