While we don't yet know the details, have enough information to say that 1) the approach was unstabilized, 2) the engines provided thrust when they initiated a go-around (too late), 3) no emergency was declared before the accident happened unlike the BA accident. The only thing in common with these two accidents is that they are the same model of airplane and that both landed short of the runway. We don't know whether it was pilot error, but it looks very unlikely to be the same problem, especially since Boeing reviewed all 777 aircraft after that accident. A third option of course is that the root cause was not found in the earlier investigation and that there is a different problem affecting the type, but so far pilot error seems to be the most likely cause.