There is a big difference trying to scrub soiled windows (bird muck) when comparing a Tucker brush and a Gardiners SL brush 4 storeys high using cold water. The Tucker is twice as easy in comparison.
I cut my Tucker stock's down to the very bare minimum so they are the same weight as Gardiners SL brush but have many more bristles left in the stock to aid cleaning and gliding horizontally across the glass when rinsing. The only problem I have using Tucker brushes is when using hot water, the bristles on the Tucker brush cause some black seals to run initially whereas the Gardiners brush bristles don't because they are not Dupont bristles.
Heated water also makes the cleaning a lot easier (less scrubbing effort or pressure required).
The reason I can spot the comparisons so easily is because I suffer from rheumatoid arthritis and am more aware of the extra pressure required to shift the same stubborn dirt using both brushes.
I don't fancy using flocked brushes because they slowly accumulate dirt on the bristles which occasionally need cleaning to remove. I prefer double trim mono filament brushes as I never need to clean the brushes, even after doing black, filthy initial cleans or washing fascias, gutters, etc.
Gardiners SL brush is good, but could be improved for the domestic market by making the stock wider and fitting more bristles, weight is not of importance. Also a longer stock would be more suitable on large glass for commercial work. The lightness is only important when working 3 storey upwards.