As you probably figured out by their names, the T14 is an ultrabook with a 14 inch display. wile the Vaio T15 has a 15.6 inch screen.
The new models will both feature capacitive touch panels that let you interact with the Windows 8 user interface by tapping and swiping on the glass. You can also use the touchpad and keyboard if you’d rather not get fingerprint smudges on the screen.
Both laptops are expected to hit the streets this spring, with the 14 inch model going for about $800 and the larger 15 inch version selling for $950.