There are some really big genetically bred Cape Buff in RSA on several ranches. I am not familiar with either of these outfitters but that doesn't mean anything....everyother South African and his brother are either PH's or Outfitters!
I haven't priced an RSA Buff hunt in several years and the cost may have come way down but they used to be 10 times the cost of Buff in ZiIM or ZAM
If you are dead set on RSA, I have a friend with four big ones on quota next year. I have hunted with him five times and he is also my taxidermist.
Let me know if you want to check him out.
BTW, he is a Bow hunter and actually prefers to book Bow hunters but still books me and my rifle....have not been to see him and family in over two years now and they are beitchin so I plan on spending 3 or 4 weeks with him next year.....we will find something to do!