I'm pretty sure the only difference of being "made in Vermont" is just that. Since some people are insistent on buying American-made, it's nice they give you the option. A quite pricy option, but that's the cost of keeping jobs in the states...
I'm pretty sure that to actual put "made in USA" on a product, they are required to actually assemble in the states, and a certain percentage of the materials must be domestic. This does not, however, exclude commonwealths of the USA (ie, Marianna Islands, Puerto Rico, etc.) They are allowed to use the made in USA label.
Based on RGT's reputation, and a hunch that it's actually considered fraud to fake the USA label, I'm quite sure these products are actually produced in VT.