I know guys who have no complaints about the Dunlops and I've found the Trailwings to be ok. In the depths of a Scottish Winter, they were fine on muck covered road, greasy cobbles and even frozen rivers flowing across the road. Yesterday I got the toe of my size 8 boot down for the first time. So you can scratch on them as well.
If Tourances are really better then they must be pretty impressive.