In contrast to Warhammer Fantasy Battles 4e and Warhammer Fantasy Battles 5e, which were quite similar, 6e changed some things up. All the cards for the magic system went away, being replaced by dice throws, and the magic items were now in the core rulebook and the army books as text entries, not available as a large set of cards. Also concepts like unit strength were introduced.
This was the last version of Warhammer we played, before a couple years of hiatus, and when i took Warhammer up again, it had gotten killed by Games Workshop. At that time I got into the oldhammer mindset, and created Warfork Fantasy Battles, which I played since.