How does Specializes road fork compare to Easton or Oval concepts?

I have a 2007 Tarmac Pro and was considering upgrading the fork and seat post to Easton or Oval Concepts.

I can’t find specs on the Specialized fork on the site since they never sold it separately but I assume the Easton is lighter, stronger, and more aero.

The clamping system on the aftermarket posts seams more secure and lighter.