Both are bad in their own ways.
Like I said, I think the best possible outcome for South Africa was to have a good man, like Chief Buthelezi control post-Apartheid SA, rather than Mandel. Reagan met Buthelezi and came away very impressed with him.
Sorry for taking so long to respond.
Buthelezi would have been better, and as chief of his people, he has the advantage of actually being a legitimate (i.e. non-democratically elected) leader.
However, hoping that Buthelezi could have prevented post-apartheid South Africa from turning into a wastepit of black revenge fantasies is probably akin to hoping that a slightly stronger picket fence could hold back an approaching avalanche.
The sad part is that the land is actually originally white anywise. As best we can tell, Bantu peoples didn’t migrate into the territory controlled by South Africa until *after* the Dutch had started colonising it. The Dutch apparently found the land unoccupied when they started migrating there.