Don't forget that F9 has Leap X 1a motors on their NEO's as opposed to the PW NEO's. This was a requirement from GE as a quid pro quo for renegotiating existing leases during the F9 restructuring. The PW NEO has been flying since September of 2014. The Leap X NEO just had its maiden flight on May 19th, 2015.

The Leap X is scheduled to be certified in mid 2016. Hopefully there are no delays in the delivery schedule.