it's a can of worms! in volkswagen owned brands the cheapest hence poorest quality would be in quality ascending order skoda-seat-volkswagen-audi-bugatti, lamborginin, bentley, porsche etc and others
You would of thought so wouldn't you, but in reality that is simply not the case, maybe Skoda need to 'prove a point'? which is why their cars are consistently screwed together than the VW car they are based upon.
Speaking from personal experience, the
MKI Octavia was better then the MK4 Golf,
MKI Skoda Superb was better than the Passat B5/ B5.5
MKII Octavia is better built than the MK5 Golf
MKII Superb better than the new Passat
SWMBO owns a MK5 Golf and whilst it is a good car, it suffers from crap build quality (for a German built car) the dashboard rattles and creaks like a good 'un and I don't expect to have to rectify VW poor build quality to make it quiet(er)
It is still a good car compared to others but put it next to an equivalent spec vRS and I'm afraid it comes 2nd.