I agree with the above post, and to leapfrog from that I'll say this:
What a lot of you need to do is really ask yourself what you want to learn, how you like to learn, and what school that will accomadate the two in the best way. This often means you need to do a bit of research to see what actually working in the industry demands and asking yourself honestly what you want to eventually do.
Different fashion schools are in a mode that leans toward one aspect of the fashion industry whether it's mass design, high end design, technique, textiles, styling, etc.
Parsons differs from FIT mainly because unlike FIT it trains the students for a more design than technical aspect of the industry. Students learn to sew but are more prepared to become designers and illustrators. Some few will go on to become big names in the high end industry but many will take on assitant jobs at larger and more mainstream companies (Kenneth Cole rather than Cloak or DKNY rather than Proenza Schouler) and many others will go on to companies like Abercrombie or GAP. Their jobs there will be pure design and never have to worry much about construction issues.
FIT is geared more towards the technical side. While it does have a fashion course, even that is technical. You find in the later ends of it subjects such as knitting engineering and children wear semantics being taught. There are even more nut and bolt courses such as Patternmaking, Menswear, and certificate programs in leather, haute couture, and women's tailoring. These people often to go on to find jobs with high ends designers like Marc Jacobs or Narciso Rodriguez, not as designers but sample makers and pattern makers. These are the people that take the sketches, flats, and story boards and then must figure out how to make them and then produce samples.
That isn't to say you can't go to either school and do the other type of job, or even do a completely different type of job I didn't talk about. It just means the school's way of working and curriculum caters towards this. And I really simplified it, a lot of schools mix the two approches or contain some element of the other.
Another mode that is popular with large univerisities is the focus on the textiles of fashion. My school does a lot of textile work but in the science areas. Like chemistry for dying, computer programming for production, knitting technology, and textile testing for flammability and chemical finishes. They also have a merchandising section but that is geared more toward mass market and low end business thather than buying for a small boutique or even a deparment store.
Central St.Martins has a textile course but their focus is more on the artistic exploitation of material. Students learn about textile technical knowledge but spend more time in the studio rather than the lab. These students go on to become knitwear designers for high end labels (Chanel Knits Department) or do print design (Eley Kishimoto), etc.
Take it all in stride. You can go to any school and still be succesful. For years FIT was never considered as good as parsons but recently you'll find more and more FIT grads making a splash like Francisco Costa and David Szeto.
And you'll find that even if you go to a famous school like Central St.Martins you could end up being a belt designer at Abercrombie.