P8P67 LE:
Limited Edition (or Less Expensive) less option version
Analog power system
1x PCIe x16
1x PCIe x16 (x16 slot, wired for x4)
No Bluetooth
Limited overclocking options
One UltraDMA controller for older PATA drives
P8P67:
Base version
Digi+VRM 12+2 phase power
1x PCIe x16
1x PCIe x16 (x16 slot, wired for x4)
Full overclocking options
2x FireWire
P8P67 Pro:
Base version plus
2x PCIe x16 slots (if one is used it's x16, if both it's x8/x8)
1x PCIe x16 (x16 slot, wired for x4)
2x eSATA connectors
P8P67 Deluxe:
Pro plus
Digi+VRM 16+2 phase power
2x USB 3.0 front panel
2x GbE LAN