Yes, the A350 has more range. However, about six carriers are ordering the A350-800 in small amounts. Many more carriers are ordering the A350-900 and 1000 series planes. Airbus has hinted they may cancel production of the A350-800 at the time they have announced A330-800neo series at the Farnborough Air Show. They have more reason to cancel production of the series, now that HA has replaced their 350-800 order with 330-800s instead.
To note, HA expects deliveries of the A330-800 in 2019, two years later than their original order for the A350-800.