They are two different foamers. The Foam on 5 works well and you would probably do better with that one seeing as you do other types of pressure washing. We do not sell the water hose foamer, it was a plan at one time, but we gave up on the idea of marketing them. Too many risk factors involved.
There is a guy pretty near you that has had some really good luck with that Foam on 5, here is his website:
Shannon Diversified - Kitchen Hood Exhaust Cleaning Mainteneance Services