What are the required documents for a non-immigrant F visa compared to a non-immigrant ED visa for an internship in Thailand?

Hello everybody, I was supposed to apply for a non immigrant ED (Internship at the UN) in Vientiane and booked an appointment. I just received the official letter from the UN, and somehow they changed into a non immigrant F (diplomatic visa). To be on the safe side, I wanted to know if the required documents are roughly the same than for an ED (form, passport, photos, official note). I checked on the website of Thai Embassy in Laos and couldn't find any info. Thanks a lot for helping