Those boots will do the job but if you are planning to go in Africa more often pls mind few things:
1. There is a lot of dust and sand so leather would be easier to clean that any other material
2. Stalking is name of the game so look for soft and silent sole
3. Lot of torn and sharp rocks can easily cut through textile. Again, leather is good choice
4. You will mainly hunt in dry area so any membrane will just prevent your foot from proper ventilation - doesn't matter how "breathable" this layer is. Also, would be smart to bring extra pair with membrane - just in case.
5. A lot of seeds will be "attracted" by textile so you will spend some time cleaning it every now and then. I especially remember some "klitz grass" (at least its pronounced so in Afrikaans) which made me busy 15min after every hunt, taking this thing off of my shoe laces and trousers. Again, leather winn.
6. Gaiters are THE MUST! Copying PHs, I used 5" high gaiters made of hard khaki cotton. Found them at Midway for 10$, best buy I ever had.
12 ys ago I bought best stalking boots I ever had. They was made in Namibia from seal skin. Tick but extremely soft leather (therefore reco for person who have bunion problems) with very soft and silent sole. Unfortunately, due to seal colonies protection, factory can not find seal skin any more so they stopped production. Since I can not find them any more, I am using them just for Africa hunts and meanwhile keeping them stored. Definitively not most beautiful boots but for hunt in hot and dry can not find anything better