The audio is fine. There's for sure a notable difference in the frequency spectrum between the two voices due the fact that one comes from a better microphone a

The audio is fine. There's for sure a notable difference in the frequency spectrum between the two voices due the fact that one comes from a better microphone and is directly sampled while the other comes off a presumably low rate audio stream. Nothing however than filtering and normalization applied in the right intervals can't correct. This aside, I found both of them very understandable although they're not native English speakers, just like me.