I'm surprised you didn't find a bunch of results. Searching for "fomapan" might work better than just "foma".
Basically, the films are grainy for their speed and many people downrate them by a stop; some people really like their spectral response. Fomapan 200 is something of an oddball, with a different grain structure---some people really love it. The 120 films are coated on a blue base, which startles people the first time they see it.
To my taste, Fomapan 100 is pretty grainy for routine use in 35mm, but fine in larger formats. Your taste may vary. I didn't find that Fomapan 400 had anything extremely special about it, but it was a perfectly good faster film, and I found it came out pretty close to box speed in HC-110.