It was a really tough one, I went for the Briggs Stratton 750 with higher pressure but lower flow pump that recircs back to tank, I really had my eye on the van guard engine it looked well built and had 3 years warranty but the pump had a higher flow rate and in my van with a 650 tank I need to keep an eye on water.
I'm chuffed with it and both felt strong when testing them, I think it will be fine for cleaning bus stops for two months twice a year, that's why I didn't want to go expensive for something to be sat there.