I think Stybar chose for flat cyclocross tubulars (I'm not a specialist as far as material is concerned so if someone could help me) while Albert chose for road-like tyres with much more pressure on, which gave him a great advantage in the sprint (while Styby is normally faster) but a huge disadvantage in the technical part.
Again I'm no specialist. So what I say is open to criticism.
By the way it's the first time I've seen Nys fight till the end when in a bad position, which is nice from him.