Using the provided "data"

Samurai
Ninja
Summoner
Bard

Total: 17,000

vs

Dragoon
Monk
Machinist
Red Mage

Total: 16200

This doesn't account for any class synergy that may occur. (For example, the Machinist gets the Dragoon bonus, while the party gets the Trick Attack bonus from Ninja)

16200 / 17000 = ~.95

So long as the 'low ball' value can still clear content, then this is a meaningless discussion.