Would this Home Theater system perform better than this set of PC speakers?

http://reviews.cnet.com/home-theater-systems/sony-ht-5500d/4505-6740_7-20051212.html

vs

http://reviews.cnet.com/pc-speakers/z-5500-digital-speaker/4505-3179_7-31115626.html?tag=mncol;lst

thanks!!
i actually have the Sony system at home but I am considering whether or not I should use the Sony or buy the logitech speakers