As many people have said, from LAX-HKG you're going to be looking at a lot of water and views from both sides of the aircraft are not likely to differ greatly.

What's more worth noting is that in the A seat your mini table is on the left and in the K seat it's on the right. So K might be better for right-handed people are A for left-handed. It's marginal but over the course of the 15-16 hours you need to sit in the seat, it's noticeable.