Rollout vs ET

Assuming same size tires( i have never swapped front tires out unless they needed changed)
I have never in all my years of bracket racing and index racing on a pro tree( sometimes both types on the same night) have i ever, with anything i have ever owned, seen more than a few hundreds( like 3 or 4 at the very most) difference between shallow and deep. Ever.
And frankly, cant say as i remember as much as 4, maybe 2 or 3.