What is the most noticeable difference between Philipp Bayer Ving Tsun and other Wing Chun styles?

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"The result of my training and thinking was implanted by Wong Sifu. He kicked my ass many times! The best time with Sifu was not my Hong Kong period -- that period mostly concerned the development of my basics. However, when Wong Sifu came over to Germany to my hometown in Menden during the 1990's, I did a lot of personal training with him. That was the most interesting period for me. Wong Sifu gave me a lot of tips and deeper insight into as to how Ving Tsun works. He made it clear to me that movements and training methods are not to be seen as an application, but to develop behaviour. In particular that has coloured my Ving Tsun. Maybe if I had missed that information, my Ving Tsun would have been very different".
PB