Does the VT-d feature on the i7 have measurable VM gains over the i5 on 2013 RMBP?

Some days ago Apple refreshed the MacBooks pro and I'm looking for either well sourced reviews of the hardware capabilities between the models or real world experience to help me value the increased cost of the i7 (3.0 GHz) over the i5 (2.6 GHz) on the new Macbook Pro 13" with retina display (ME662LL/A which presumably will be marketed as an early 2013 model) . I've done some research on [Intel's site](http://ark.intel.com/fr/compare/72056,71255) and, by my reckoning, the CPU release dates / frequencies imply Apple is using 2 possible CPU for the new 13 inch with Retina that ships with 256 GB of storage (which like the CPU can also be upgraded for additional cost). Can someone confirm/corroborate that the i5-3230M and i7-3540M are used so that I can rely on Intel's description of the chips or are there other factors at play with Apple hardware. It seems like the GPU of the i7 support higher frequency & the i7 has more virtualization features. As a regular user of virtualization, does this CPU upgrade offer benefits for VM performance past the incremental change in clock speeds (Intel's VT-d feature sounds good, but I don't understand if it helps existing Mac virtualization software run better or faster)? I realize no one can make buying decisions, but hoped to learn more about how the hardware works so we all can learn more about what goes on under the hood of this model Mac.