so I got up a bit earlier than normal, and was thinking about the starting bonuses for each game were a bit different.
so ended up with a spread sheet, starting the game 10 times, 6 times with legendary resources, and 4 times with strategic balance
the way it's counted, is by access for the starting city, the 36 tiles it can reach.
link to the sheet:
think it shows that iron is not that common, and in legendary resources it just has a higher value per tile, and not more tiles in the map.
this was a gut feeling I had.