Welcome to the forum.
I have some advice that may not be of much help, but...
The problem that I find with in-car navigation is that it tends not to be up to the minute and doesn't receive regular updates. I've never used an OEM Honda navigation system, but I had a pioneer touchscreen navigation system in my Accord. I liked it until I got an android smartphone, equipped with google maps. Google maps doesn't have "pre-loaded" maps in the phone's memory, but relies on the data connection to download maps directly off of the google maps server, the same way your pc does. Another huge plus is that it gives live traffic overlays on the maps and your route, allowing for an easy reroute to avoid heavy traffic. That has really helped me shave time off of trips several times.
With that in mind, I didn't bother spending the extra money on a nav equipped CT, my phone more than meets my expectations for directions, mapping, etc.
Be that as it may, if I had your concern, I would try to determine how the maps on the Honda nav system are updated and how frequently they are updated. Good luck!
I have some advice that may not be of much help, but...
The problem that I find with in-car navigation is that it tends not to be up to the minute and doesn't receive regular updates. I've never used an OEM Honda navigation system, but I had a pioneer touchscreen navigation system in my Accord. I liked it until I got an android smartphone, equipped with google maps. Google maps doesn't have "pre-loaded" maps in the phone's memory, but relies on the data connection to download maps directly off of the google maps server, the same way your pc does. Another huge plus is that it gives live traffic overlays on the maps and your route, allowing for an easy reroute to avoid heavy traffic. That has really helped me shave time off of trips several times.
With that in mind, I didn't bother spending the extra money on a nav equipped CT, my phone more than meets my expectations for directions, mapping, etc.
Be that as it may, if I had your concern, I would try to determine how the maps on the Honda nav system are updated and how frequently they are updated. Good luck!