I have one that I use with a hose reel with 90m of 1/2 braided hose. With regards to distance it is pretty similar to a 15LPM everflo 12V diaphragm pump on full chat but there is definitely a lot more psi and “flow”.
Depends what you are using it for... if you are just pre treating for patios/drive ways I would go for the 12V pump and if you are spraying warehouses/roofs I’d probably go for the comet. With the comet you would need quite a big tank to feed it with your water/chemical mix as it does go through some mix IMO.