Hectares vs. Km of Piste

The US resorts tend to use skiable area as a measure of the size of the
resort, making it difficult to compare with the length of runs used by
almost of all of the European resorts.

Why the difference and is there any way of comparing US and Euro resorts on
size ?

(Of course there are a host of other stats you can use as well but I am
curious)

Oh and a Happy New Year to the group.

All the best,

Edi

PS: We did have a white Xmas in Glasgow but its difficult to ski on 1cm ! Ok
for sledging on the hills with the kids.