Frequency analysis graphs are the answer: they are not affected by playback hardware (or wetware) …
Closer to the green equalization, & the desibilator …
I don’t hear echo on your Adam recording, (just muffled equalization).
Windows can add echo-y effects (a/k/a “enhancements”) to playback,
here’s a YouTube showing how to switch them off …https://youtu.be/sxnUjiGgBaI
[ You should disable any audio “enhancements” in the playback & recording tabs of Windows sound control panel ]