P6T, Deluxe, WS Pro... Differences?

[grandmaster]

I recently constructed a PC for a client using the Asus P6T WS Pro motherboard and to be frank, it is the best computer I've ever built. In terms of stability and its compatibility with my bespoke applications, it's light years ahead of my own Gigabyte EX58-UD5 system.

So I want to swap over my parts to this board and use a ghost image of the WS Pro set-up so I can replicate this dream system.

The thing is, I really don't need the twin PCI-X slots. So is the WS Pro the same (bar the PCI-X slots) as the P6T, the Deluxe, or neither?