As the title says what is the big differences between these 2 motherboards except that the asus one does not have usb3 that you can connect to the front on your case?
AsRock 970 Pro3 R2.0, AM3+, AMD970, DDR3, ATX
http://www.asrock.com/mb/AMD/970%20Pro3%20R2.0/?cat=Specifications
Asus M5A97 LE R2.0, AM3+, AMD 970, DDR3, ATX
http://www.asus.com/Motherboards/M5A97_LE_R20/
AsRock 970 Pro3 R2.0, AM3+, AMD970, DDR3, ATX
http://www.asrock.com/mb/AMD/970%20Pro3%20R2.0/?cat=Specifications
Asus M5A97 LE R2.0, AM3+, AMD 970, DDR3, ATX
http://www.asus.com/Motherboards/M5A97_LE_R20/