Many antifouling paint manufacturers provide compatibility charts
that list competing products that their product is (or isn't) compatible with.
I've noticed that the (Interlux ACT) antifouling paint bonds with itself each successive coat, meaning that each coat liquefies/melds into the underlying coat(s) and becomes a single
thicker coat. Compare that to the (different manufacturer) previous layer of paint that requires a rough sanded surface to form the bond between itself and the new paint.
In other words, there is 'compatible', and then there is compatible.