Vikings vs Mongolia:
UU:
Bersheker (+10% city attack, free amphibious) vs Keshik (+1

,+1

, no iron requirement, +1 first strike, 60% collateral damage):
No unit can compare easily with
Keshik. This mounted unit has all the attributes to make it extremely dangerous and aggresive in the battle field. It is almost impossible not to be defeated from the mongol army at least once, due to this unit.
UB:
Trading post (Free navigation, +1 merchant slot) vs Ger (+2XP points):
Trading post's extra slot makes the difference. However, it isn't useful in the UHV anymore. There are plenty of turns to reach America and trade routes don't count for the UHV. On the other hand ger combined with barracks and one military instructor can make the mongolian army a real invicible nightmare.
UP:
Raiding (More

from pillaging, conquering and sinking) vs Terror (enemy cities unrest (temporal loss of cultural influence and fortifications)
The
new mongol UP scares even expert players. The only way to defend succesfully your land is building an offencive army, else suffer the consequnces! It is the first time I see a mongol UP that is generally usefull and consitent. The first power (surrending) was almost unusable, while the second (free army) was good, but a little bit annoying, even if the human player controled the Mongols. I approve this change

.
1st goal:
Viking possesion vs China:
The
vikings need more effort to control an other core, so I'll vote in favour of them.
2nd goal:
Newfoundland vs razing:
Newfoundland seems better, it is a standard strategy, but it needs a kind of attention. On the other hand you will conquer so many cities as the Mongols, that the question isn't "how I will raze seven cities" but the question is "which seven cities should I raze".
3rd goal:
Raiding vs the mongol empire:
The
empire building wins.
Draw.
Historicity:
Both are accurate enough. They are interesting military campaignes with their special characteristics. I should mention, Vikings need to tech to aquire the appropriate techs, while Mongols (the SVN version) should control the 15% of the world.
Gameplay:
Before the SVN I would say that I hate the mongol gameplay, because you need a lot of reloading due to their need of constant win. However, after playing the SVN version things changed a lot and I was able to play as Temujin without interrupating the game with reloads. So I vote for
Mongols.
So the
Genkhis Khanate wins!