Net pressure will be less with 1/4" line, especially 200' out, but you can always battle that by turning it up a little like Wolfman does.
Keep in mind the wand valve and wand solution line might only be 5/32" inside diameter, you can only push that water through that small straw so fast, there is a limit on net flow at the jets.
Most wands don't put out what everyone thinks they put out, you OWE it to yourself to do a 60 second bucket test, you just might be surprised.
And please spare me the 2.1 gpm claims we've heard for so many years, you are not getitng that out of an old school wand, todays Greenhorn only puts out 1.5 - 1.7 gpm and it has 5x02=010 flow.