I have tried all these combination tools over the years.
The worst ones are the flip over types like this new moerman one.
The main reason the are useless IMO is when it comes to stubborn bird crap, you just have to keep rubbing n rubbing n rubbing til it comes away, you can't get any real pressure onto the applicator to give it a good scrub, unlike a normal applicator with the scrubber on the sides that remove the stubborn stuff a lot faster.
The best and fastest combination squeegee ever on the market was Peter Fogwills Squeegee Mates, the way you fitted this onto squeegee allowed you to apply pressure in removing stubborn marks, pity he stopped making them years ago as I am down to my last 12" inch one