the santa cruz blur isn't single pivot. Take a closer look and you will see that it's 4-bar. It has what they call a "virtual pivot point" or vpp where the axel travels in a slight S shape path which reduces pedal bob.
The FSR axel path is pretty much straight vertical which is why specialized developed the brain shock to counter bob.
I know that Intense is also marketing the vpp suspension on their Spider which is looking to be a sweet xc rig.