Hi Neil, difficult to say as very new to truck mount
but it appears to be in the region of 40% quicker.
Not as big a difference on small jobs although the joy of not having to get the m/c out, fill the tank, plug it in and wait for it to heat up is fantastic. Real savings come in when the jobs get bigger, 5 bed house with no buckets of clean/dirty water to shift, I love it. I still have Host, a proprietory hot bonnet cleaning system and my trusty twin vac. I,m not sure that the vacuum on a truck mount is any more powerful than a top of the range portable, but the pressure of the pump and the temperature of the solution definately is. Drying times reduced by about 50% too.
Chris Meyer NCCA 1053