Yes, which is also directly related to the frequency response/tonality, so I don't know how you can seperate that from tonality/frequency response. (Also loudness differences I noticed which again could be just frequency response/tonality shifts and/or maybe overall measured difference in dB, but maybe overall measured depending on which weighting you use). To me it seems like there are too many variables in the whole chain through the recording chain & through playback chain for useful comparisons. (Differences in personal HRTF between people would also affect the recordings & playback considering this is binaural in his ear, but that comes under the recording & playback chain I mentioned above, and also amoungst all the other variables that I haven't listed that are still contained within that same recording & playback chain).