Ok so the same is accomplished in the end. So the two reasons I would choose Modules>Shipping> Free Shipping Options would be
(1) if for some reason I want both USPS and Free Shipping to show for the customer. Which I personally can not think of any reason for this to be desired.
(2) if I wanted more options like total weight etc., the Modules>Shipping> Free Shipping Options would allow that.

I hope that I have that right?

With that said if someone were to want to base their free shipping off of say total weight of the order they would use the Free Shipping Options module. By doing that they will have the free option show along side the USPS option for the customer. Maybe some sort of admin option for the store owner could be introduced into future versions? A way to not show other shipping options to the customer if any free shipping options are available. By doing that maybe the concept of free shipping could all be moved to one single place in ZenCart instead of tow different places as it is now? Just a thought and maybe a bad thought since I am not the one with the overall knowledge of this.

Thanks for the help!...... and bearing with me. :)
Luke