Foma 100 tends to block highlights, gray tones are very different. FP4 ist different too, but not as strong as Foma 100. Foma 200 ist closer and a much better film.
The closest at least for me ist Kentmere100/APX 100(new)/CHM 100 (it is all the same).
BTW: Kentmere 400 ist similar to NP27.
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