Fire with fire (Score 1)

With our custom performance testing service, we work with you to define test goals. Then we put together the necessary tools and do the testing. We report the results back to you in a form that satisfies the test goals...

Why not put together the funds to pay Mindcraft? Commission them to do a real study, publicly announce it, make sure that the hardware is the same and get the best people in both camps to tune their machines. It could be a win for all parties. Except one :)

You may say that Mindcraft is biased, but if you are a paying customer, they have to live up to their promise and guarantees. Of course they could turn down the work, but then you would have the truest indication of their motives. Money should be the same color, no matter who's hands it is coming from.