They're nothing essential really. The alternate version of "We Belong" is just Joe singing all the way through rather than all five members sharing verses. I slightly prefer this version but the song itself is not a favourite of mine. Then there's a radio edit of "Let's Go" which cuts off the "Do you really wanna do this now..." intro and just launches straight into the song, plus the guitar solo is shortened. It was only £1 more than the regular CD here in the UK anyway.