Not sure. Rather, the problem is in different compilation flags. Half a year ago, the situation was reversed, in favor of chromium. Looks like chromium use hardlocked gpu acceleration options and video decoding use sw opengl.
I tested versions only from repositories, and it is not known who compilated them and how. Test video from balbes150 smooth. My own sample h264 720p and 1080p looks ok too. As before but now it work out of box(no need run video with flags --vo --sws-scaler manually)