What's difference between intel Q6600 & X3220

[chaparral]

Looking at the specs they both look the same

Intel Core 2 Quad Pro Q6600
- Quad Core Technology
- 2.40GHz clock speed
- 8MB L2 Cache
- Intel Speedstep Technology
- EM64T 64-Bit Technology
- Execute Disable Bit
- Cooler running technology, less heat and less noise!
- Supplied with Intel referance heatsink & fan
- 3yr Warranty

Intel Xeon 3200 Series X3220
- Quad Core Technology
- 2.40GHz clock speed
- 8MB L2 Cache
- Intel Speedstep Technology
- EM64T 64-Bit Technology
- Execute Disable Bit
- Cooler running technology, less heat and less noise!
- Supplied with Intel referance heatsink & fan
- 3yr Warranty


Q6600 http://www.overclockers.co.uk/showproduct.php?prodid=CP-143-IN&groupid=701&catid=6&subcat=793
X3220 http://www.overclockers.co.uk/showproduct.php?prodid=CP-149-IN&groupid=701&catid=6&subcat=793