The S1909WX is a 19-inch model features the following:
– 1440 x 900 resolution,
– 1,000:1 contrast ratio
– 300cd/m2 brightness rating
– HDCP compatible DVI port.

As for the 17-inch S1709W, its features list reads:
– 1440 x 900 resolution
– 600:1 contrast ratio
– 250cd/m2 brightness
– VGA port

The 19-inch model retails for $199, while the 17-inch one is $20 cheaper ($179). Truth be told, customers looking for a new monitor would do better to spend the extra $20 on the S1909WX, given its superior list of features.