Ustaad sahibaan ko ye jo gussa aya h na, specially Vague ko, bohut bohut bohut valid h...
bachon ki tarha bagair kisi research work k shuru ho jate ho sare k sare...
reading some articles and reading some reviews does not make anyone a person with knowledge and experience on how to treat different things. Muft k mashware ache hote hain magar only for the junior things not more than that.
on the fact of comparison there is no point in comparing the two devices, its like comparing a self made go cart to a properly designed and manufactured track car for beginners, yes in some circumstances speed of the both may be at par, but that one fact does not make both equal.
as usman said there is much to a power washer then just the speed of water coming out of it.
Khair now stop all this chatter and get your buckets and clean to improperly cleaned rides... and then wax them properly... and post the pictures of what you did (not dozens but a couple would do) and ask the questions where you had some hurdles.