Let's be very careful with these names. The vanilla P5B has problems the P5B Deluxe does not have, including overclockability. As I understand the debate, the community considers either the P5W or the P5B Deluxe to be the best C2D overclocker. This is in stark contrast to the regular ol' P5B, which is not recommended for overclocking at all!
But yeah, the big difference between the Wifi version and standard Deluxe is they want to charge you $40 for an onboard Wifi connection, when you can pick up a USB Wifi dongle or internal Wifi card for less than $20. Thumbsdown, says I.