There are several differences between the 05-10 and the 11-14 UCA and UCA mount. The UCA for the 05-10 is 8.5" long, while the UCA for the 11-14 is 9.5" long. The overall length of the mount and arm assembly is the same, but the 11-14 mount had to have the cross bolt moved back 1" to compensate for the longer arm. Ford decided to go with this longer upper control arm because it will result in a more stable rear end, reducing axle movement during suspension travel. The longer your control arm, the more gradual the suspension movement is.
Upgrading to the 11-14 upper control arm is a very simple upgrade. The only parts you need are the 11-14 arm (BMR part number UTCA030, UTCA032, UTCA033), 11-14 mount (BMR part number UCM002), and 11-14 forward bolt (OEM part number W714389-S439). 05-10 UCA/mount should NEVER be mixed with 11-14 UCA/mount. The 11-14 hardware is much larger (18mm) than the 05-10 (14mm). Along with the hardware changes, the mounting point on the bracket will cause your pinion angle to pitch up or down dramatically.