This article has some information on the new characteristics:

- Although considered to be an iterative upgrade from the Falcon 9 v1.1 that preceded it, the modifications to the Full Thrust version have increased the vehicle’s published liftoff capabilities by as much as 30 percent.

- A key component of this performance increase is the use of “densified” propellant. By chilling the liquid oxygen to minus 340 degrees Fahrenheit (minus 207 degrees Celsius) and the RP-1, a highly-refined form of kerosene used as rocket fuel, to 20 degrees Fahrenheit ( minus 7 degrees Celsius), SpaceX has demonstrated the capability to store more oxidizer and fuel in a given volume, as well as increase the flow of propellant through the turbopumps on the first stage’s nine Merlin 1D powerplants and on the upper stage’s lone MVac.