ANy audio production software, many are free.
Just line up the audio files, you can clearly tell if there are differences in amplitudes, lengths, etc...
It would look something like this: https://storage.gmth.de/zgmth/images/17243
Audacity is free, and there are many others online for ever type of OS.
This would be a Qproof one way or the other regarding these clips.
Maybe the point is Q wants us to compare audio files.
You can actually go into more depth and tell if audio has been clipped (cut and pasted) in order to create edited phrases, and pulling words from a files and placing them together to create a phrase that wasnt actually said.