I have seen a steempro in action
once and own a ninja , it seems the water lift is a key point to consider.
There are two different steempros one called a powerflo I think that has the 2 * 3 stage motors and 220" inches water lift. the other is quite low on the inches of lift. 130" or 140 "
My ninja has two 2 *3 stage motors and really extracts well and leaves the carpet much drier. one thing I know is that ninja is
very easy to upgrade , I cant speak for the prochem but I understand all the machines are good.
If you are buying new then i would look at the ninja and spend the cash on the heavy duty vac motors which i think give
240" :oof lift.
I have run mine with 150 ft of hose twice now and even on wool carpets it really pulls a lot of the moisture out .
I like the slighlty higher clearance underneath the ninja which means if you do have to go inside you don't bottom out on patio door bottoms for example.
they say the steempro is whispher quiet but i found sticking a old bit of vac hose on the exhaust of my ninja really quiets her down, stick the exhaust pipe out the patio door for example.
I think you may also find the prochem heating option is quite pricey compared to the ninja .
I think :-/you can upgrade to as much as 400 psi on the ninja.
As you can tell i am a bit of fan of the ninja , but i know it does the job.
I personally thinks the ninja looks more industrial and heavy duty, adds to the customer thinking they have hired a real piece of kit to do the job especially with all the truckmount fellas adverts slating portables
i would like to see them do some of the ridicously tight new housing estates round here.
All the best
Alex