Tom,
They both are. The difference is how and where the speed and velocity is recorded.
The "in housing" spec that you see in the owners manual is taken when all of the tubing is off of the machine directly at the housing. Why they post this escapes me a bit since all of that velocity and high volume of air mean very little if there is no concentration or direction of that air.
We took the liberty of posting the numbers that matter. We pulled the the speed and velocity with all of the tubing and reducers attached. These are the numbers when the machine is in use.