Should I go to both London shows in September?

I can't decide if it is worthwhile seeing Death Cab both nights in London in September. I already have tickets for the first night and am tempted to get tickets for night two as well.

I saw the band for the first time at All Points East a couple years ago when they played Transatlanticism in full and it was great, so I know they put on a good show.

Does the band mix up the setlist much if they play more than one night?