You could send an email to sales@pgmusic.com and ask.

An .MP3 posted here wouldn’t show any difference because the .MP3 would be compressed. And once we have the audiophile version, the program uses only the .WAV files.
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BIAB 2020 Win Audiophile & 2020 Mac UltraPak. Software: Cakewalk, Adobe Audition CC, Notion; Win 10 64 Pro. Hardware: custom i7 16 Gb; Roland Integra-7, Focusrite 18i20(2), TCE Finalizer, Behringer X-Touch, Adam sub & monitors.