see if this tool help comparing feature of desktop boards http://ark.intel.com/ProductCollection.aspx?familyId=1125
I am currently working on a spec ambiguities issue (i.e., "Core i5 750 & DP55WB spec ambiguities") and just read your referred link above. Strangely enough, I found the spec comparison table generated from that link seems not quite accurate. For example, if you choose to compare DP55WB with DP55KG, it shows their Bus Type as QPI. Aren't they supposed to use 2GB/s DMI Bus? My understanding is that QPI is no longer needed on P55 system because Lynnfield processors already incorporated on-die 16 lanes PCI-e controller.
One more ambiguity found.