what are the differences between noble and the level above?
edit: uops, didn't notice you play warlords. This is for BTS:
Noble:
Base bonuses:
+2 health
+4 happy
8 free units
–1 AI attitude
Hut results:
20%  low gold
15%  high gold
10%  Warrior, technology, exp., maps
5%  Scout, healing
5%  strong barbarians
10%  weak barbarians
Modifiers:
research  ×1.00
unit cost  ×0.50
distance maint.  ×0.75
civic upkeep  ×0.80
inflation  ×0.90
AI costs  ×1.00
Barbs:
85% animal attack probability
animal strength: –40%
barbarians in 35 turns
barb. city creation prob.: 60%
2 free wins vs. barbarians
barbarian strength: –10%
Prince:
Base bonuses:
+2 health
+4 happy
6 free units
–1 AI attitude
Hut results:
20%  low gold
10%  Warrior, technology, experience,
  high gold, maps
5%  Scout, healing
5%  strong barbarians
15%  weak barbarians
Modifiers:
research  ×1.10
unit cost  ×0.60
distance maint.  ×0.85
civic upkeep  ×0.90
inflation  ×0.95
AI costs  ×0.95
Barbs:
90% animal attack probability
animal strength: –30%
barbarians in 30 turns
barb. city creation prob.: 60%
1 free win vs. barbarians
barbarian strength: –5%