currently considering

Lenovo IdeaPad Y400 59-356819 - Dusk Black
Intel Core i7-3630QM (2.4GHz up to 3.4GHz, 6MB Cache)
Window 8
14" WLED HD
4GB DDR3 RAM
500GB HDD (5400rpm)
Nvidia GT650M 2G DDR5

Lenovo Z400 TOUCH 59-366600 - Dark Chocolate
Intel® Core™ i7 Processor I7- 3632QM (2.20Ghz/1600MHz/6MB L3 Cache)
Win 8
14.0 HD LED MULTI-TOUCH
4GB DDR3 (1 x 4096MB)
1TB HDD
Nvidia GT740 2GB

The price is about the same, so which is better?
Does touch screen useful? seems cool