Almost everything in same on both boards except few differences. LE board have 4 USB 3.0 ports. 2 at back and 2 at mid board. mid board ports can be used for front usb ports in the casing. It's some advantage comparing to non LE board. But I really can't see why non LE board is expensive than the other. By the way what does LE stands for?
Check the image at the bottom of this page. You can see usb 3.0 portshttps://www.asus.com/Motherboards/P9X79_LE/