I’ve got an Omani friend who literally said there is difference between them and Yemeni but also similarity. He literally said Omani wouldn’t be apart of Yemen because their own thing the same way Socotries wouldn’t be apart of Yemen because their own thingThe difference is regional one as most of the south of Yemen especially in Mehra region aren't different from those on the otherside of the border in Dhofar region or province in Oman