IMHO there are 2 different things that can make a difference TMY vs FP4.
One is spectral response, how face colors are separated in the color to BW conversion film makes, this can be matched by filtration, but sure we need some filtration to make a film look like the other.
The other thing is how skin glares are depicted, this is important, IMHO
None of the two films is better than the other, but different filtration/processing if needed to look similar...
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