one thing is I think the cluster size (is it called a file allocation unit in windows?) they are smaller on an NTFS partition so... think of it like this, you make a call on your phone for 29 seconds, if it were fat32 you would be billed a minute, and if it were NTFS it would be more like 30 seconds, less wasted space on your disk. Not sure if what I am saying is correct but I believe it is one of the differences. ALSO directory/file permissions are more... secure? on NTFS, only problem is if you make it so only one user cna access the data, you basically are screwed if you lose that account.
may help, may not