His mechs look slightly different in Milwaukee.
Sabathia had a more violent delivery when he was younger. I would say much of his recent success the last few years has stemmed from being more controlled resulting in less walks.
Most of the clips you posted including this one is copyrighted by MLB, NOT by anyone associated with SetPro. If find it HILARIOUS that they would have a problem with clips of video footage they don't even own to be posted on a free forum.