From what I can gather at Amazon, if you have ordered this
http://www.amazon.co.uk/exec/obidos/...169445-0174053
you'll be getting both DVDs from the two series.
This is the listing for the
Big Brother 1 DVD and this is the listing for the
Big Brother 2 DVD.
So you'll not loose anything. The DVDs have more footage than the videos like multi-angle for the soap opera task and Josh's arrival. Also the introductions to the housemates and their audition tapes.