It seems that though the BRF15 & 100 may be new to linhofstudio's catalogue, from a Google search they seem to have been introduced last year. So clearly the current stock was not made by Ilford. According to the search some people claimed they were made by Forte but in view of what has been said above this may not be correct. One of life's little mysteries I guess.
I believe these presently are manufactured by the former ORWO, now known as Filmotec. Fortepan 100, itself, may not have been manufactured by Forte after it resumed its operations in early 2005 following its initial suspension of operations. I have some Fortepan 100 that was manufactured after this time and, even accounting for the considerable variations that can result in different production runs of Forte products , it seems a different emulsion alltogether.
Digital Photography is just "why-tech" not "high tech"..