JAXAshby wrote:
The terms
are interchangeable,


they are not interchangeable, though those who never use either might think so.
Much the same way someone who never drives a truck might think the terms
two-speed axel and transmission overdrive are interchangeable. only to those
who have never been there.

EG they are interchangeable, though those (such as JAXAshby) who never
use either might not think so.