USA date format best practise

I am working on a table that displays dates by using USA format. I was wondering which format below is more legible or usable - I guess there's a slight difference between these two, but I was wondering if there's any previous research or existing pattern. Please note that dates will be displayed across the platform and we should use a consistent format whether it's displayed in a table or not.

a) Nov 20, 2020

b) 11/20/2020

Thanks!