Does the 150 version you have, have 2 heating elements?
ANY smoker needs to be evaluated for run up time. Remember, we don't advise cooking on time here, there are too many variables. Go on finishing temp.
Best recommendation I'd say is to test you machine, get a good remote therm and validate the temps on a particular setting and if it's important to you, how long it takes to run up.
As it's a new unit (to you); I'd highly recommend the tests, we call the mapping