Well. The main thing is that in order to use any of the fancy stuff on XP or W2000..you have to go with ntfs. By fancy stuff I mean..compression, encryption, dynamic disks and some or all of the security permissions etc.
A link
http://www.ntfs.com/ntfs_vs_fat.htm
Another link (where the first link came from)
http://users.pandora.be/educypedia/c.../memorymbr.htm
Also, ntfs stores another copy of the master boot record (mbr) besides the one at the first sector....to be honest, im not sure how to explain it, but it makes ntfs a little safer, lol. (In other words I dont know if ntfs heals itself if the first mbr gets corrupted or if we have to do it thru commands etc)
JP