Probably best if you don't get started on history, you seem to have a few strange versions of it. I've never heard of any landmines in the Western Cape, in fact any serious conflict there at all. The Boer war mostly took place around the Transvaal and Natal, and I don't think landmines were used much. More of the guerilla warfare they were so famous for inventing. Mozambique however, that's a different story. Lots of peeps getting around minus various amounts of limbs. Not really as windy as CT either so I've only kited there once, as oppose to three times in CT.
Australia, however, features in the top ten genocidal countries in the world, according to the museum of genocide in Rwanda. Our state sponsored slaughter of aborigines was a bit harsh back in the 18th and 19th centuries, and earlier in the 20th century our policies were very similar to aparthied. Very very similar. So 'who has done the worst to there locals' (spelling mistake included for authenticity) is still pretty open to debate in my books. What handouts the aboriginals get now compared to South African blacks (you're allowed to call them black there) is a different story. Thing is though, if you're unemployed in SA it doesn't matter what colour you are, the social security setup is almost non-existant.
Anyway back to the original question, I'd say WA in feb and CT later. The seasons are almost identical but CT is a bit longer, so I think your best chance for wind in both is optimised in this way. It's wind though, you know what it's like.
Cape Town wind is generally stronger than Perth, perhaps on a par with Gero? I don't know Gero so well though. I know that Perth will sit around 20-25 knots on a typical day (wish there were a few more typical days right now

) and Cape Town is more like 25-30 knots, pushing over that a bit more often than Perth would out of its range.
Temp. Eish. Met Eish, as the jaarpies say. Cape Town water is serious brass monkeys year round. Full length wetsuit, no questions. it actually gets warmer in winter due to the way the currents work, but that's like saying I'm closer to the moon than you are, it doesn't make much difference. A mad mate of mine reckons he's been out in boardshorts in winter there once, I reckon he can keep it. WA though, boardshorts are fine, I haven't bothered with even a shortie wetsuit this summer.
Anyway in respect to the no commercial content on the forum I won't post the link here, I'll pm you, but if anyone else wants to know drop me a line, I've got a mate there who has just set up a downwind shuttle service. Looks like fun. (I hope that wasn't too commercial itself?) If epic downwinders in seriously sexy waves doesn't interest you give him a shout anyway, he knows pretty much everyone who has ever put up a kite in South Africa and will be happy to share local knowlege and maybe a beer, though he's trying to give them up.