The reason why growth in GDP has, nevertheless, been lower than in Sweden is  2  BIS central bankers’ speeches  weaker domestic demand as a result of the strong downturn in the Danish housing market after the overheating, with a resultant loss of wealth and negative implications for private consumption.
In general, it does not make sense to speak of “structurally weak competitiveness”. Weak competitiveness is temporary, not permanent. After a while it will strengthen as a result of developments in wages and exchange rates. With the fixed-exchange-rate policy, Denmark has deselected the latter option. Over a period of time, extensive structural reforms have been introduced in Denmark.