They should be very very close. Any comparison is only going to be valid for that specific gun, using the specific bullets used, in the specific brass that was used, and for that exact powder charge used.
Unless the test was conducted using dozens of guns and dozens of different bullet types and dozens of different charges it would not have any statistical significance to the majority of people.
Don't get me wrong, I'd be interested in knowing the results from such a test but I'd be hesitant to think any test done by some random person would apply to me. Assuming your using an appropriate bullet it will be much more accurate than 99% of people can shoot anyways.