Hi
I use both the flocked dual trim splayed and also use the non flocked dual trim on another pole. Both work great, getting into corners etc., but my preference is the flocked one.
I just like the extra water it holds. I started with Vikan flocked brushes and the flocked superlite works just as well.
I rinse off the glass so if it retains more muck than the non flocked then it doesn't effect the clean anyway.
Spruce