Most South African Cats
like the Voyage or the Robertson & Cain Cats are build for the Charter
Market and for that reason the bridgedeck clearance is not that important since sailing form one Carribean isalnd to the next will always go well.
These are both excellent build cats but mainly build for chartering since that is the biggest market for cats.
Other cats build in South Africa
like the St. Francis 50 , The Gunboat 48 and 64,
The SMG 50 or the African Cats
405, 455 and 555 are build mostly for private owners and these private owners will undertake long trips and bridgedeck is more important.