I've mounted two tvs with Rocket fish mounts. They are very versatile very accommodating to most TV. I would recommend that you mount on the middle of a flat wall. The size and curvature might present some challenges if you were to mount in a corner.
I need a mount this size that fits flush to the wall. I do not need to tilt or adjust the tv. Is this mount available through your company for Vesa 200x600?
I actually have it flushed again the wall, there is so many options. I am moving next month and I will enjoy the other features it has. So keep all the items you don't use and save it, you may need it or change your mind.
I doubt it. This articulating mount has a hinged bracket that allows the arm to slide and extend (for viewing at angles). Unless the fixed mount has a similar set up it won't work. You might want to contact Rocketfish directly. I'm sure they can give you a definitive answer.