So ok, I bought 8N from known reseller, who showed me earphones before buying (just opened for test purposes).
Here are my thougns after a few hours of lessoning (in compare to 8S):
-- in plus --
better build quality
already tuned grey-black-gold which is much better then 8S factory tuning set
wider soundstage, much wider
better instruments placement
clearer highs and stronger bass (on factory filter set)
manual better readable
-- in minus --
only one color to choose (cyan)
no silver cable set (it will be great to compose own set with Ag cable in shop)
more expensive than 8S
no ear hooks on stock cupper cable
stock tips gives weak outside noise blocking, use SpinFits instead.
Generally 8N is more refined version of 8S. Stock cupper cable looks the same like in older version (pins are different, I know). Box looks the same also, oval metal cointainer is so heavy, like before.