Information regarding the correct Salaah times

I am hanafi, would like to know which method to choose for correct time salaat mkhuse south Africa:
Umm Al-Qur
(Fajr Twilight = 18.5 Degrees, Isha = 90 minutes (120 minutes in Ramadan) after the Sunset.)
North Americ
(Fajr Twilight = 15 Degrees, Isha Twilight = 15 Degrees)
University Of Islamic Sciences, Karaci
(Fajr Twilight = 18 Degrees, Isha Twilight = 18 Degrees)
Muslim World Leage
(Fajr Twilight = 18 Degrees, Isha Twilight = 17 Degrees)
Egyptian General Authority of Sur
(Fajr Twilight = 19.5 Degrees, Isha Twilight = 17.5 Degrees)