Is there some differences between the Vaulters and the Mezari Faction, except the skin

Ok so I found some answers on Amplitude forums.

Battlefield and positioning

Yes, you have to engage your opponent on the tile side where you want to locate your army. If you hover your opponent while you keep right click pressed, a preview of the battlefield will appear.
Reinforcements are simply the other armies that are located in the battlefield.

Turns

In a nutshell, it's not implemented yet:

In the final game we plan to offer a game setting that will allow you to control every round if you wish so. It will probably be 3 settings: simple (1 order phase), normal (3 phases), advanced (6 phases). In all these setting we always keep the same number of rounds (6 rounds), not to change the game balance.

Ranged attacks

Same as for turns: it's still a work in progress.

The scores for various actions are available in the install location. For the future I found this in the folder ....\Steam\steamapps\common\Endless Legend\Public\Statistics and Achievements\, on Windows. The file is GameScoreDefinitions.xml. The overall score seems to be a weighted sum, which means you multiply the weight by the value. E.g: Knowing 3 technologies is worth 3*5.0 = 15 points towards overall score. Data in the file listed below.

<GameScoreDefinition Name="GlobalScore" Tags="Global,Ranked">
 <WeighedGameStatisticReference Name="SumOfAllUnitsLevels"     Weight="2.0"/>
 <WeighedGameStatisticReference Name="SumOfAllHeroesLevels"    Weight="5.0"/>
 <WeighedGameStatisticReference Name="NumberOfCities"          Weight="5.0"/>
 <WeighedGameStatisticReference Name="NumberOfDistricts"       Weight="2.0"/>
 <WeighedGameStatisticReference Name="NumberOfLevel1Districts" Weight="5.0"/>
 <WeighedGameStatisticReference Name="NumberOfLevel2Districts" Weight="10.0"/>
 <WeighedGameStatisticReference Name="TotalPopulation"         Weight="3.0"/>
 <WeighedGameStatisticReference Name="NumberOfImprovements"    Weight="1.0"/>
 <WeighedGameStatisticReference Name="NumberOfTechnologies"    Weight="5.0"/>
</GameScoreDefinition>