I think a linguistics expert would be able to clarify it because accent is a lot about pronunciation, but I've noted difference among the Cape Afrikaans accent, the Pretoria accent and the more standard accent spoken in the non-coastal areas.
The Cape Afrikaans accent is not to be confused with the dialect, Kaaps, and actually like Kaaps Afrikaans people in the Western Cape region like to mix Afrikaans and English which makes their accent a bit different from the inland accents.
There's an accent spoken mainly in Pretoria(and some places in Gauteng) people loosely refer to as the "Pretorian accent". They overround some sounds, specifically the "a" sound. They would pronounce "ja" as "jo".
For me personally the main differences among the Afrikaans-speaking peoples in SA are mainly the vocabulary and expressions they use. In some regions people would use more anglicisms than others. Afrikaans has a lot of expressions and in the anglicized business world in most of the bustling cities one would most likely miss words and phrases unique to Afrikaans. I've found the people of rural communities and smaller cities to use older Afrikaans expressions much more.
"Verder sê Hy vir my: Dit het klaar gebeur. Ek is die Alfa en die Omega, die Begin en die Einde. Aan elkeen wat dors het, sal Ek te drinke gee uit die fontein met die water van die lewe, verniet. "