you won't get a reply off Blue i'm afraid
Progressives are great with 15W oil, linear well. . .Personally I'm not getting on, but thats because since having the washers pulled out of the forks that were preload and 10W oil put in, they aren't happy. When they're set up properly,and heavier oil, they behave.(not like the bouncy castle at the mo) theres not much difference IMO.
I have both, so can easily compare.