Capot and brakedwell:
Not an easy choice! Both forts have that distinct local look, with the round towers and the crenellated battlements. Both have been much restored since the 1960s. Jahili Fort is now in the centre of Al Ain, and Buraimi Fort is in the (smaller) town of Buraimi.
The key might be that Jahili Fort is about 7 km from Dau'di airfield and about 4 km from Hamasa, whereas Hamasa is just 500 m from Buraimi Fort, as brakedwell described.
Capot: I think in fact Sheikh Zayed was not born in Jahili. His birthplace was restored and opened up as a museum a couple of years ago, a bit away from Jahili. There is no lack of forts around there!
Laurence