F9P Base with M8P Rover

Hi I have a fleet of drones with M8P RTK (Here3) rover units. With the current M8P (Here+) base station the accuracy is fit for purpose. I’m looking to purchase a 2nd base station and keep the rover units I have currently.

Is there any value in using an F9P base station with the M8P rovers? Or should I just buy another Here+ M8P base station.
Does the base station upgrade have increased accuracy or improved RTK Fixed lock with the M8P rovers??