For the most part, I don't think there was much confusion at the airport. During check-in, I asked what type of aircraft it was and they told me it was an A330. One thing you might check is if the flt OZ743 is an A330, then you will be on the same plane on the way from BKK-ICN. For example if you are booked on flight OZ744 for Sept 20 at 1:00am, then the aircraft used for flight OZ743 arriving to BKK around 11:45pm on Sept 19, that will be your aircraft.