try lowering 150-300 hz to remove muddy low end and raise 1250 and raise 5k for clarity
also, one method to match mics is to play pink noise in both and then in spectral view, make them match up.
you can also add multiband compression to change dynamic response non-linearly across the spectrum.(no more than 1.5x-2x) which gives people the special ability to speak louder only at specific frequencies. Har-ball used to do the opposite and gave control over that.
TDR NOVA is a free plugin and has built in volume per freq and compressor adjustments. This newer tech is called ‘dynamic equalizing’.
once you get the clarity back, you can use a studio reverb at 1% at 150hz which gives a subtle 416 smooth sound.