I believe Song Style comes directly from Shanxi style and of late I am beginning to like the look of Shanxi and Song more than the Hebei I do. Shanxi and Song seem to look a little softer and that make the fajin, at least to me, more visible. Or it could just be my Taijiquan side talking... that or I am just getting old
By the way thoe first two videos are Zhao Rongchan and they are very good. The third one is also rather good and I read that he is Zhao Rongchan