Marketing?, you are wrong the Replicant 100 is not only marketing but something special, some says that's a Gyger variant and could be.
The patent by Gyger comes from the 80's end and the Replicant 100 comes from around those years when appeared for the first time in the MC 3000.
Note that I said a variant but not similar, is an Ortofon exclusive for what I understand.
Yes, as @stringreen posted very sensitive to tiny changes in VTA/SRA and very sensitive because its very special shape.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.