I can't say anything about the excess death rate. My source is the VG webpage I included. It seems unlikely that there are enough people over 70 to make a 3 to 1 difference between the two countries. Perhaps someone can provide a reference to correct me.
It's likely to be somewhere in the order of 20% (that's the figure for over 65s for Europe as a whole).
Excess deaths is definitely a better measure than those attributed to Covid - e.g. it was reported in Australia deaths were recorded as due to covid in any case that a hospital patient tested +ve even if the immediate cause of death was unrelated - i.e. they almost certainly would have died anyway regardless of Covid.