score:4
This issue gets super confusing, and you probably won't get "comprehensive." The one thing you got going for you is that if you ask any Orthodox Christian which calendar they follow, they'll have an answer for you lickedy-split, due to how divisive this issue has been historically and still continues to be.
Okay. There is actually two distinct "new calendars" and only one "old calendar." The "old" is the Julian calendar, it is a reformed and corrected Roman calendar introduced by Julius Caesar in 46 B.C. A good but slightly technical overview is here. The "new" is actually the Revised Julian or the Gregorian. As you may know the Gregorian is the one we are all familiar with. The Revised Julian is essentially the Gregorian but ties the date of Pascha to the Julian calendar. Few Orthodox churches use the Gregorian exclusively.
From Orthodoxwiki:
-The Julian Calendar churches are: Jerusalem, Russia, Serbia, Georgia, Poland, Sinai, Ukraine, and Japan.
-The Revised Julian Calendar churches are: Constantinople, Alexandria, Antioch, Romania, Bulgaria, Cyprus, Greece, Albania, Czech Lands and Slovakia, Estonia and the OCA.
-The Gregorian Calendar church is: Finland.
A number of the above churches also have some parishes and dioceses which are on a different calendar than their respective primates, most especially the Ecumenical Patriarchate of Constantinople in the diaspora, which has many Julian Calendar parishes.
Each Orthodox Church or Jurisdiction has chosen which calendar they will follow. What makes it difficult, and why "comprehensive" will escape us is because so many parishes and dioceses have made calendar decisions that are not always in line with their "mother-Church."
For information on each of the churches listed above, I would suggest visiting Orthodoxwiki.org's list of autocephalous and autonomous churches. Most of the listed Churches' pages include a sidebar that will tell you which calendar they follow. For those that do not, there may be more information in the article. Hope that helps.