Which of these 2 laptops is the best spec?

trying to decide which would be the best of these two laptops as they both have different graphics cards, and on one the os is vista and the other 7 . http://www.argos.co.uk/static/Product/partNumber/5070712/Trail/searchtext%3ELAPTOPS+ASUS.htm or http://www.argos.co.uk/static/Product/partNumber/5082298/Trail/searchtext%3ELAPTOPS+ASUS.htm