It’s not really like that at all. Turtle Wax treat them as interchangeable, not as separate products in any way, so why would resellers.
If (if!) there are any differences, and Turtle Wax themselves heavily indicate there aren’t, so unless John works there and mixes them himself I’m not sure where he’s getting his information from, it’s more akin to ordering Coke Zero and getting Coke Zero with more bubbles in, really*.
*Yeah, I have no idea what ingredients are in Coke Zero to make a better analogy.