Since airlines on average fill their planes 70% full, I would say 90% of the time the A346 is a much better choice than the B744. Only during peak seasons, the A346 might be a bit small. The A346 has lower unit operating cost and more cargo capacity. Seat-for-seat, the A346 is a B742 replacement. But in terms of operating economics, it can be an effective B744 replacement. That's why BA is looking into the B773ER to replace some of their B744s.