Rex Ryan has been effusive in his praise of Taylor this offseason, while has been much less enthusiastic about Cassel.
Taylor has never started an NFL game, but his speed is appealing in Greg Roman's offense. Earlier this month, Cassel struggled at Bills minicamp with his movement and accuracy. We project the Bills to finish in the bottom seven offensively in the NFL due to their quarterback issues. The Bills will lean heavily on the defense and running game and the quarterback who makes the least mistakes during training camp will likely get the job. Stay away for fantasy purposes.
Source: Pro Football Talk