What are you criteria for a better hunt? Wilderness, costs, experience, hunting time, adventure, sight-seeing, plain game potential, trophy size, food, tracking experience, limit risk, etc. ?
If this is the safari of a lifetime --> Tansania,
if not write down your criteria put a weight to each of them (here experience from others might help), compare and decide.
You can do 2 safaris in SA for the price of one in TZ but they are different.
in. SA no malaria, no TseTse, no charter, low daily rate (~500), high buffalo trophy fee (~10000), high fences, overall good infrastructure in the country, an adventure in controlled environment.
in TZ you got complete wilderness, no high fences, free range, option for 1-4 buff on license, buff that have never seen a human, high daily rate (~1500) but moderate trophy fee (~5000), expensive charter ~2000), least developed infrastructure, a greater adventure
There is saying: when we have a choice, we most likely know which choice we want, the hardest part is to accept it.