A tucker dual trim has the middle parts of the brush bristles shorter than the exterior ones so the external ones splay a bit to stop water spray, get in the corners etc and is considered by many in the states a better brush but it does depend on the type of work you do. Tucker will advise.
They do an interesting one that has a sponge centre for use with hot glass to dissapate the heat. I think they have about 6 different brushes in their range but they are a bit heavy.
10" for domestics 16 for commercial