The obvious reason why we do not have a NF mark of the Mosquito in the game is that the game doesn't simulate night bomber/fighter operations.
The Mosquito FB VI is of course the right choice for the game as it perfectly fits into the tactical environment it simulates and it was used in large numbers. Crying for any other version - especially a NF - is as stupid as crying for a flyable Lancaster, flyable B-17 or flyable Bf 110 night fighter. Even a flyable Mosquito B IV wouldn't be useful as there is no map for it.
What's left is a possible discussion about the performance of the Mosquito FB VI we have in the game.
IMHO this is a very good report about the
relative performance of it:
http://www.wwiiaircraftperformance.o...I-tactical.pdf
That trials could have been made with the game, couldn't they
The only question is whether our Mosquito has a Merlin 21 or Merlin 23 (which would boost the performance a bit).