The water and air cooled torch are the same . the only difference is the water has the 2 extra lines so you can hook up to a cooler. If a customer asks me about this i simply point this out to them and let them know they have the option of using it as either air or water cooled.
Obviously from what you are saying the U.S does things a little differently , but i really have no idea why they would suggest sending the same torch minus the lines.