If I may, I 'd prefer the classical one on the right as it provides really an overview of the terrain.
In this phase (map selection), I don't think we need to look for resources. As a minimap during the game (as shown on the left) this is exactly the opposite - I need to see resources, other players, as far visible at the respective stage. Terrain overview would be interesting in that phase as well, but I am afraid the minimap would be to cowded.
Would it be useful to switch minimap in a different mode or temporarily enlarge it while a button is pressed to , say, half the screen? Then it could make sense to show simultaneously terrain details and resources and players.
Just my twocents.
Best regards,
Grautvornix