It's 16.5 at the bridge and the width at the nut is wider than an SR as is the neck overall. I own an 846V and a pair of SR 6 strings. Very few mass made 6's have wider spacing than this. There's nothing I can't manage to do on any of them, so I'm not sure what your point is.
My point is that I simply prefer a wider spacing than 16.5-17mm at the bridge.
I'm glad you can manage to do everything you like on 16.5mm. I can also manage to get from Tokyo to Osaka on a kickbike... but usually I prefer to use train.
(on an unrelated point: if the specs say "Saddles can be adjusted 1.5mm sideways", this is a bit pointless if moving the outer saddles by 1.5mm puts the outmost strings off the fingerboard.)
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