Also i would like to draw your attention towards the wheelbase of both the chairs, the chair on the http://my.frooition.com/080395/images/za... has 5 wheels in the base and the second chair has only four wheels in the base which would be less relaxing as comapred to the first one.
All over i would suggest you to go with the first computer chair.
Which computer chair is better. http://my.frooition.com/080395/images/zarablack1.jpeg This type of material or http://i.ebayimg.com/00/s/NjUwWDY1MA==/z/oogAAOSw3d1Tzbc-/$_12.JPG ? Are they like both equally comfortable? And what's the difference... Thanks.