If I could pick between those two I would get this one:
http://www.ebuyer.com/570065-zoostor...p-pc-7873-0495
Better processor, 16GB RAM and better HD. It also has an open expansion slot so it later you wish to drop a better video and power supply.
Thats if you had to pick between those two. But, like Damian is saying... they are real basic systems. Spending a bit more for SSD and better video makes a huge difference in speed.