Colin, the physics is constant across all manufacturers. The distance node point from to the virtual image has to be optimized so it's really about optimized setups.
I have used the NAD800 with the 230mm (Nauticam's, which is basically the Zen glass) with the 16-35mm VR, and from f7.1 up, the corners go from above average to good, as reported by many others.
The 200mm Zen dome I used with the 16-35L II on a NA5D2 (the lenses are similar in mfd with 1cm difference for the Canon) and the corner performance was average at f7.1 (slight softness) up and only good from f11.
If you must absolutely have the best picture with the sharpest corners for the 16-35, get the bigger dome. If you shoot more with the fisheye and can accept not so great corners at less than f11, then get the 200mm.
The weight and size different between a 230mm and 200mm isn't that big. The corner performance and DOF gain is much bigger.
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