Yeah, I forget what the difference was, but I remember reading about it because I was thinking about getting XII Int.
From a guide on gamefaqs (
Differences/Extras Guide by Split Infinity):
"Shortly after accepting Rogue Tomato hunt from Tomaj, you can start tinkering
with learning the licenses in order to improve your chrs. But what's that...
instead of one big LB there are *twelve* LB! Each LB represents a job in Zodiac
Job System (also note that shape of each LB is roughly the same as respective
zodiac sign).
The jobs at your disposal are: white mage, dragoon, machinist, red mage,
knight, monk, time mage, breaker, archer, black mage, samurai and thief.
Once you choose a job, *you cannot change it*! This is very important to take
into consideration, so think twice before choosing a job. Of course, you can
choose not to select any job and play the game that way, but it'll be extremely
challenging and you'll be missing out on bonuses from jobs."