FF III is a fun game, like most of the first few (I - VII)

There is quite a wide variety of jobs, but each character has their own story mapped out for them (This mainly happened after FF II) There's a bit of a difference in the graphics in my opinion though, the FF III people are smaller and look cuter, and FF III is an actual tbs (Turn based strategy) whearas FF IV has a timer based strategy like FF V, VII etc

I recomend you get it, it's a good game!