Does using a high Cm reverse horizontal tail airfoil coupled with a low Cm wing increase horizontal tail effectiveness?

Just noticed that the Zenith 701 wing uses a NACA650-18 which is low cm, while their inverted horizontal stabilator uses a NACA4412 foil which is a high cm foil. They could just as easily used a low cm NACA0018 or NACA2415 foil with a slatted elevator to get the same cL, but they chose a high cm foil instead

I'm assuming using a low cm wing and a high cm horizontal tail adds to the effective moment produced by the area of the horizontal tail, allowing for a smaller horizontal tail area.

Is this correct?

Does using a high Cm reverse horizontal tail airfoil coupled with a low Cm wing increase horizontal tail effectiveness?

Just noticed that the Zenith 701 wing uses a NACA650-18 which is low $C_m$, while their inverted horizontal stabilizer uses a NACA4412 foil which is a high $C_m$ foil. They could just as easily have used a low cm NACA0018 or NACA2415 foil with a slotted elevator to get the same $C_L$, but they chose a high $C_m$ foil instead

I'm assuming using a low $C_m$ wing and a high $C_m$ horizontal tail adds to the effective moment produced by the area of the horizontal tail, allowing for a smaller horizontal tail area.

Is this correct?