Originally Posted by ORDnHKG

For now it is consistenly with those 2 planes, however there is always a chance for swap as there are only 2 of those planes with that particular config, however the chance is low.

You choose to book that far ahead of schedule, that is your own risk to take, anything can happen in those 5 months, I don't even think they publish the schedule that far ahead, they are only showing whatever they are flying right now.