Yeah, that would be more valuable. "Boston" is a huge portion of "MA", while (for example) "San Francisco" is but a small slice of "CA", so if the Boston area were compared directly against the San Francisco area, the results would no doubt be quite different.
Many of the Boston area tech companies are actually outside Boston (Cambridge, Rt 128) while many of the SF area companies are similarly outside San Franscisco (Palo Alto, Mountain View, Cupertino, Berkeley, etc).