"The two Core i7 series - for the sockets LGA1156 and LGA1366 - offer similar pricing and specifications, with the exception of Gulftown-based hexacore products which only exist in one series and stand out in both aspects. So it's very interesting to find out whether such "twofold existence" is actually justified."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips