How to deal with big change in tone?

It is possible to match the equalization, but you can still tell the difference because the “sample 1” interviewee phone has more digital-compression-artifacts, (sounds more computery) …

What I did was apply the custom “Treboost” equalization-curve shown below (and XML attached) to the muffled (“sample 1”) interviewee …
''Treboost'' EQ curve.png
Treboost.xml (17.9 KB)
Then apply Steve’s “level speech” effect at ~90% …
Steve's ''Level Speech' plugin , (used after ''Treboost'' equalization).png