This model a from the same factory as the American units of the non-HEX generation. The outer tub is made of plastic, just like on all Duets. The suspension is a little stiffer than on the US version. Still, during the rinse, the tub lowers by a good inch. Water levels are low during regular cycles.
Yes, it's Persil but the towels are colorfast so no problem there.
Yes, it's a true boil wash defined at 203F. Since several decades, washers don't actually produce/use boiling water any more.