Arduino UNO or Seeeduino: Noob question

Yes, absolutely the Arduino team deserves it, but if I can get something extra for the same price and actually find that something extra useful, it betters the bigger picture of what Arduino is achieving. It will also drive the Arduino boards to incorporate more features to enhance the whole learning experience that Arduino offers, as well as the capabilities that the Arduino board have.

And hence my question regarding what I actually get extra (in laymans noob language) and whether that extra is usefull/noticable. If the consensus is "yes", then I will see what the final cost will be for me to ship the Seeeduino to South Africa, pay customs etc, and weigh that price against the price of the Arduino here in South Africa.

From one supplier over here the UNO and Duemilanove costs (converted to $$$) $43 each. From RS South Africa it costs $34 (who doesn't have it in stock at the moment nor are they returning my enquiries).

So do you understand why I am considering my options? :-/