Thanks for the comments guys.
I also looked at the Polo GTi and I have to admit, the quality on the inside is nice, until you compare it to that of the Golf GTi - then you start to see where they cut corners. After all, it's still only a Polo, and it shows. As for the performance between the Polo and the Golf - I've seen a couple of Youtube clips and the GTi is stronger and slightly faster than the Polo - even though their 0-100 times are quoted as being the same.
Also, the Polo has NO option of Xenons in South Africa, and the panoramic roof that it can come with DOESN'T close on the inside OR open up - so it's a piece of glass designed to bake the occupants. So yeah - you'd have to be pretty biased or clueless to prefer the Polo over the Golf if you had the money to spend on the Golf. If you're on a tight budget, the Polo would be "ok".