In my experience it is far from mission impossible and obtain useful information about noise, distortion, and frequency response information in gear from well made recordings. If you can hear it there will be reliable evidence to be obtained. It is far more likely that the recording will be incompetently made than that someone on their game won't be able to obtain the necessary information from it. Again, if there is an audible difference between what these firmwares do, reluiable evidence of it, both audible and measurable, will very likely to be very easy to obtain from a reasonably well made recording. Why not? Unsure of yourself?