when you fill the EE application you need to select the noc, and attach the letter. When the officer reviews your application, it checks that the duties in the attached letter correspond with the duties of the noc you selected.
if they match, the officer gives thumbs up. If they do not, the officer refuses the work experience.
sometimes the profession has different name, depending of the company, country, even language...
what is important is that duties in noc and in your later match