The biggest improovement is not in the engine TBO and power margin(although excellent) but in the removal of the Tail Rotor yaw compensator which is replaced with additional boss weights on the TR Blades to assist the pilot with RH pedal incase of hydraulic failure. This eliminates the risk of playing with the wrong switch during flight causing the tail rotor to go hard when all the hydraulic fluid drains from the yaw load compensator nullifying it's ability to assist. Purchase price the same but running cost lower due the engine TBO. Also the engine will do its own maintenance checks now via a 3rd computer to further lower maint requirements.