TN-1 for Canadians would be much more comparable to the E-3 for Australians than the H1-B1 for Chile and Singapore as the H1-B1 doesn't allow dual intent and is

TN-1 for Canadians would be much more comparable to the E-3 for Australians than the H1-B1 for Chile and Singapore as the H1-B1 doesn't allow dual intent and is only valid for one year.