I like Vasari better than the other races but if you look at the stats on their ships they're disproportionately more expensive both in terms of credits, metal and crystal but also pop cap compared to their counterparts.
Case in point: Heavy Cruisers:
http://roe.totalgamingnetwork.com/wiki/index.php/Sins_of_a_Solar_Empire/HeavyTotal Health (shield + hull)1650 TEC - Kodiak Heavy Cruiser
1600 Advent - Destra Crusader
1880 Vasari - Skarovas Enforcer
Skarovas Enforcer has 14% more health than Kodiak Heavy Cruiser
Skarovas Enforcer has 17.5% more health than Destra Crusader
DPS18 TEC - Kodiak Heavy Cruiser
19 Advent -Destra Crusader
20 Vasari - Skarovas Enforcer
Skarovas Enforcer does 11% more DPS than Kodiak Heavy Cruiser
Skarovas Enforcer does 5% more DPS than Destra Crusader
Credits500 TEC - Kodiak Heavy Cruiser
525 Advent -Destra Crusader
625 Vasari - Skarovas Enforcer
Skarovas Enforcer costs 25% more credits than Kodiak Heavy Cruiser
Skarovas Enforcer costs 19% more credits than Destra Crusader
Metal100 TEC - Kodiak Heavy Cruiser
100 Advent -Destra Crusader
150 Vasari - Skarovas Enforcer
Skarovas Enforcer costs 50% more metal than Kodiak Heavy Cruiser
Skarovas Enforcer costs 50% more metal than Destra Crusader
Crystal70 TEC - Kodiak Heavy Cruiser
90 Advent -Destra Crusader
110 Vasari - Skarovas Enforcer
Skarovas Enforcer costs 57% more crystal than Kodiak Heavy Cruiser
Skarovas Enforcer costs 22% more crystal than Destra Crusader
Pop Cap10 TEC - Kodiak Heavy Cruiser
10 Advent -Destra Crusader
12 Vasari - Skarovas Enforcer
Skarovas Enforcer costs 20% more population than Kodiak Heavy Cruiser
Skarovas Enforcer costs 20% more population than Destra Crusader
Skavoras Enforcer is an average of 11.875% more effective for an average of 32.875% more expensive.
Note I obtained the average effectiveness number by averaging the DPS and Health percentage results and the costs by averaging the credits, metal, crystal and pop cap costs percentage results so they are may or may not be accurate, the rest of the numbers are pure math though. As for the rest of the stats on the ships they're pretty much identical except for rate of fire and the TEC ship having .5 more armor.