+1 I have the same question - I'm guessing there may be some Serato / Rekordbox politics in play here.
@Pioneer can you give us a steer please - if we want to use Rekordbox with a controller around the £250 mark, what should we be doing?
Personally it seems easier to get the DDJ-SB3 and to learn Serato at the moment; I'd rather go for Rekordbox if I can, but the DDJ-RB seems so far behind the SB3!
Please can you advise?