^^^sounds like a nice build^^^

I think it's mostly a matter of gearing and tire width as to how one gets off the line. I run a MTB with 1 inch slicks pumped to 100psi and it rips on the street. I also run a SS with road (700s'). In the winter the MTB gets the big fatty knobbies and the speed dramatically decreases. As for comfort.. fit in relation to abilities/fitness/body type as well as just how sporty one wants to be positioned on the ride into work would be a determinative set of factors in deciding what to buy for commuting.