Yes. It would be very helpful to know your sailing weight and where you sail.
But in general, assuming flattish water and speed runs:
Fins: 20-23cm speed fins are about right for the CA44. 23-30 for the CA53
Sail sizes: Cambered race ot speed sails. depending on your size - assuming 75-85Kg, 5.0m to 6.5m 'ishfor the CA44. 5.5m to 7m 'ish for the CA53.
There could be a bit of variation on that according to the location, water, wind conditions and your size and weight.

I will add that both of these boards are quite user friendly in that they have plenty of length and volume for their width which makes them easier to start, sail and gybe than some speed boards, and still blisteringly fast, Chris L and Spotty have both done 50's on the CA44.