We rate both cars highly. The Citroen C5 Aircross has the edge in terms of seating flexibility (with three individual rear seats) - which might be important if you regularly carry rear-seat passengers. The latest Nissan Qashqai is newer, though, and does feel a little more modern - particularly the infotainment (although the Citroen was updated last year). We'd also recommend looking at a Hyundai Tucson or Kia Sportage, if you haven't already.