some maps are large and some maps appears large.
Let's take as example :
MAP Medium Earth, 131 territories. Ex https://www.warzone.com/MultiPlayer?GameID=1775443
( 2011 baby !)
MAP Modified Medium Earth, 129 territories. Ex https://www.warzone.com/MultiPlayer?GameID=25468189
at first sight ME is bigger, right ? 2 more territories!
No, not really.
Those 2 extra territories transform East US and East Russia in bad bonus. So, while in MME America and Russia are often picked, in ME East Russia is used only in relation with Central Russia, East US is barely picked and Canada is usually unexplored since is surrounded by bad bonuses*.
Moreover the template itself favors the smaller bonuses, since luck on a 6 or 7 territories bonus can be really frustrating, while on MME nothing can go wrong if you try to get Australia or Greenland turn2.
In short some maps have some parts that are not used and so the actual "pickable" area differs from the area of the map. Europe AD 1600, to say one, has a lot of useless territories in the Ottoman empire.
Interestingly, at the moment, no QM template is an extreme example of the above
*bad bonus are those bonus that gives the same income of bonus with less territories.
Compare to Mexico, N.Africa and E.Africa are clearly worst.
All other 4s are more efficient than Middle East
Greenland, Australia, Caucasus are better than Europe, West US, Canada