Hello and welcome to the forums
Both CPUs will give you the same performance,like silversurfer mentioned,it comes down to the socket you prefer http://www.anandtech.com/show/2839
"My recommendations from the initial Lynnfield review still stand, you'll want to opt for Bloomfield processor if you care about:
1) High-end multi-GPU performance (or other uses of high bandwidth PCIe)
2) Stock Voltage Overclocking
3) Future support for 6-core Gulftown CPUs "