Out of curiosity and because there is a Miyata 916 sitting not twenty feet away from me, I went and measured. Yup, about 5mm difference with the drive side crank being further away from the center line of the bicycle - measured at the spindle. My bike has, however, been fitted with a 9 Speed crank set and transmission.

Then I measured the distance of the crank ends to the chain stays and guess what. Identical measurements.