Campbell Hausfeld is a strong manufacturer who chose a 6.0 HP Tecumseh engine, while Karcher went with a more commonly seen Honda engine. Both of these machines have high satisfaction ratings with owners and bother are available widely at good prices. The Campbell Hausfeld feels a bit more industrial but both of these units are sturdy and both have features built in to preseve the life of the machine like thermal relief valves. These two pressure washers are so much alike that we see them both as good buys. In the end you'll want to purchase the one you're most familiar with, but these are probably the two best (for the price) power washers on the market today.