The 14 is the flavor of the day. I have found that it is tough to find much objective literature comparing the 14 to the Busa.
The bottom line for me is this:
The brand new 14 is more powerful and the technology is the most recent. In every comparison it seems to only edge out the Busa, not blow it away. I am sure the 14 is an awesome bike. I like kawi’s, they make great bikes. It took them 2 tries and 8 years to finally beat the Busa. Although the 14 has more power I think that Kawasaki made some mistakes in their body design. For top end speed aerodynamics are critical and kawi did not seem to address that very well. I need to look up the drag coefficients on the Busa and the 14 but I will bet money that the Busa’s is lower and that may be enough to still be faster then the 14 on top end.