My opinion:
If Ubisoft made the game, it would feel a little dumbed down, but would have great music and atmosphere. Also, there would be a little red triangle under your firing solutions.
If Sonalysts made it, you would need a powerful rig to run the graphics and the game's physics and sound model (or whatever it's called).
I think either one would be great. I would lean more toward the Sonalysts one, because I love all the detail they put into the sim.