Sorry to reply so lately, I discover your question today.
A few years ago, I met in the island of Groix (south Brittany), the owner of a boat that I believed was a Nauticat. Actually it was a Finmar 36. The owner told me the history of Finmar.
According to him, Finmar was founded by engineers who had left Siltala (Nauticats boatyard) to create their own boatyard. They managed to build Finmar boats, very similar to Nauticats, during a few years. Then Finmar was sued by Siltala, and after trial, was obliged to destroy the moulds and cease activity.
Also according to this Finmar boat owner, the quality of construction of his boat was excellent,