Slightly more LoCa fringing on the Samyang... but you have to look pretty hard to tell the difference. The Samyang doesn't suffer from the awful focus shift when changing apertures that the Nikkor does... and the Samyang is so much sharper, who cares about slightly more bokeh fringing? If the Samyang was AF I'd have not bought the Nikkor. You wanna post up an example of this awful Bokeh with the Samyang? I never noticed it.
The 35G mounted on a D800E exhibited no focus shifting from in depth tests I read and I haven't witnessed any either. The 35G was rated sharper than the Samyang by DxO for what it's worth. As for the bokeh photozone describes it as 'nervous' but it is uglier to me than a 35G. As for the autofocus it would mean the Samyang was much more expensive and liable to the Sigma lemon syndrome.
