In my opinion……..
The Supreme is not good. It’s splayed too wide, rams the bristle tips into leaded windows and is too heavy.
My favourite is Winpros useless mop, the flocked Extreme. I love it, holds it’s shape well but wears before your eyes! It’s the only brush I’ve worn out ever! Gone through four now in probably a year. Useless in corners and sash windows too and the stock hammers the frames.
The worst Gardiners brush I have ever bought has to be the radial sill brush, what a joke! Designed all wrong. However …… trim the stupid outer bristles back level with the stiff under bristles and it’s pretty good for cleaning the runners on sash windows.