Jerry,
The question, as posed, is a very poor way of looking at, or deciding to, go one way or the other.
The fastest way to a poor outcome is to base a long-term business on a short-term answer. The decision should solely be based on what is the best fit for you, not financially, but which is the better fit. ??
There is a very important psychology that goes into any entrepreneurial endeavor, and the psychology that you enter each particular endeavor with will ultimately predict how decisions will be made, from seemingly minor ones to major ones. If psychology and path are incongruous, poor decisions will always be made. I've seen it time after time after time. And if the psychology, frame of reference -- what have you, corresponds with the center, the ideals, the soul of said project, then better, and more often than not "spot on" decisions will be made, and this will greatly determine the success or failure of that venture.
So if one's personality and nature lead them towards a drive-thru, it would be foolish to pursue a sit down if their heart's not in it, and the same would go for the other way around. Unless you are doing it purely as an investment, and then it's just an exercise in numbers.
Sometimes patience is the right decision. It makes all those seemingly difficult decisions much easier.