Does anyone have a preference of one over the other? What are the types of differences between them?
With a little testing, I have noticed Navionics appears to draw maps faster, CMAP will provide a low resolution outline then fill it in with detail after a few seconds.
Navionics uses larger text, much easier to read on smaller 7" Zues3
C-MAP allows me to scroll faster, pinch and zoom has a larger effect, where with Navionics I have to pinch many times to get the same zoom.