If both the vapor and smoke are absorbed through the lungs, both will hit the blood stream in the same manner at the same time
Where's your link for the study that supports smoke and vapor delivering in the same manner at the same time?

As for the OP, I think the problem may well be the same old 'I'm missing something with vapor', which is true. And if the wasted, couchlock feeling is what you're after, then vapor probably isn't for you.