The main difference is in the price, which starts at $1,399 for the X1 Carbon Touch. The ThinkPad X1 Carbon originally also cost that amount, but has since dropped to $1,249.
Another difference is the thinness and weight. The touchscreen variant is at 0.4 pounds heavier and 2.8 mm thicker than the 3-pound, 18 mm original. This shouldn’t worry you too much. Even with the extra weight, the X1 Carbon Touch is still among the world’s lightest 14” Ultrabooks.
As far as battery life is concerned, Lenovo claims the X1 Carbon Touch will endure a full 8 hours between recharges.
The ThinkPad X1 Carbon Touch will be available starting December on Lenovo’s website and through Lenovo’s partners.